20206-NEET-SET-CODE-50 — NEET 2026 Question Paper with Solutions

Q1 PHYSICS Unit 4: Work Energy and Power

A particle of mass M moves along a horizontal x axis from x= 0 to x= L. The coefficient of kinetic friction varies as a function of x as µk(x) = µ0 - ax, where µ0, a are constants of appropriate dimensions, so that µk(L) = 0. The total work done by the frictional force during the motion is nµ0MgL, where g is the acceleration due to gravity. The value of n is:

↻ Repeated question — also appeared in 2026 (3 sets)

A. 3
B. 1
C. 1/3
D. 1/2

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Q1 PHYSICS Unit 4: Work Energy and Power

A particle of mass M moves along a horizontal x axis from x=0 to x=L. The coefficient of kinetic friction varies as a function of x as μk(x) = μ0 - αx, where μ0, α are constants of appropriate dimensions, so that μk(L) = 0. The total work done by the frictional force during the motion is nμ0MgL, where g is the acceleration due to gravity. The value of n is:

↻ Repeated question — also appeared in 2026 (3 sets)

A. 3
B. 1
C. 1/3
D. 1/2

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Q2 PHYSICS Unit 9: Kinetic Theory of Gases

The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is twice the diameter of the molecules of B. If number densities of the gases A and B are nA and nB, respectively, then the correct option is:

↻ Repeated question — also appeared in 2026 (3 sets)

A. nA = nB
B. nA = 2nB
C. nA = 1/4 nB
D. nA = 1/2 nB

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Q2 PHYSICS Unit 9: Kinetic Theory of Gases

The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is twice the diameter of the molecules of B. If number densities of the gases A and B are nA and nB, respectively, then the correct option is:

↻ Repeated question — also appeared in 2026 (3 sets)

A. nA = nB
B. nA = 2nB
C. nA = 1/4 nB
D. nA = 1/2 nB

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Q3 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents

Two identical inductors are connected in two different configurations P and Q, where a time varying current I(t) is flowing, as shown in the figure. The induced emf between points a and b for configuration P is Ep and that for configuration Q is E0. The ratio Ep/E0 is: [Neglect the effect of mutual inductance.]

↻ Repeated question — also appeared in 2026 (2 sets)

A. 1/4
B. 1/2
C. 1
D. 2

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Q3 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents

Two identical inductors are connected in two different configurations P and Q, where a time varying current I(t) is flowing, as shown in the figure. The induced emf between points a and b for configuration P is Ep and that for configuration Q is E₀. The ratio Ep/E₀ is: [Neglect the effect of mutual inductance.]

↻ Repeated question — also appeared in 2026 (2 sets)

A. 1/4
B. 1/2
C. 1
D. 2

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Q4 PHYSICS Unit 10: Oscillations and Waves

For sound waves, if the number of nodes for the 5th harmonic of an open-ended pipe is n and that for the 9th harmonic of the same pipe with one of its ends closed is m, the ratio n/m is :

↻ Repeated question — also appeared in 2026 (2 sets)

A. 5/9
B. 9/5
C. 1
D. 3/5

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Q4 PHYSICS Unit 10: Oscillations and Waves

For sound waves, if the number of nodes for the 5th harmonic of an open-ended pipe is n and that for the 9th harmonic of the same pipe with one of its ends closed is m, the ratio n/m is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. 5/9
B. 9/5
C. 1
D. 3/5

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Q5 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

Consider a long solenoid of length l and radius r. If n is the number of turns per unit length and μ₀ is the permeability of free space, the inductance of the solenoid is:

↻ Repeated question — also appeared in 2026 (1 set)

A. μ₀n²r²l
B. μ₀n²πr²l
C. (μ₀/2π)n²r²l
D. 2μ₀πn²r²l

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Q6 PHYSICS Unit 2: Kinematics

Consider a particle moving along a straight line, whose position as a function of time is given by s(t)=at²-βt+γ, where a=1 ms⁻², β=6 ms⁻¹ and γ=5 m. The average speed of the particle, in ms⁻¹, from t=0 to t=6 s is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. 12
B. 6
C. 3

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Q7 PHYSICS Unit 18: Atoms and Nuclei

Consider the following nuclear reaction: 238U → 234Th + 4He. Take masses of 238U, 234Th and 4He as 238.050 u, 234.043 u and 4.003 u, respectively. The Q value for the reaction, in keV, is: [Given: 1 u = 931.5 MeV c⁻²]

↻ Repeated question — also appeared in 2026 (2 sets)

A. 3726
B. 3730
C. 3736
D. 3740

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Q14 PHYSICS Unit 6: Gravitation

In a solar system, the time-period of revolution of a planet tracing a circular orbit of radius R is proportional to:

↻ Repeated question — also appeared in 2026 (2 sets)

A. R1/2
B. R3/2
C. R2
D. R3

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Q15 PHYSICS Unit 13: Magnetic Effects of Current and Magnetism

Two infinitely long parallel conducting wires A and B carry currents I and 2I, respectively, in the same direction. The wire A has uniform mass per unit length λ and lies on an insulated floor. The wire B is kept fixed at a height h above the floor. The minimum magnitude of h so that the wire A does not rise from the floor is:

↻ Repeated question — also appeared in 2026 (1 set)

A. μ0I^2 / (2πλαg)
B. 2μ0I^2 / (πλαg)
C. 4μ0I^2 / (πλαg)
D. 4μ0I^2 / (πλαg)

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Q16 PHYSICS Unit 19: Electronic Devices

An ideal Zener diode with breakdown voltage of -3 V is reverse biased with a negative input voltage Vi = -5 V. The magnitude of voltage difference between points B and A is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. 3 V
B. 2 V
C. 1 V
D. 0 V

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Q17 PHYSICS Unit 8: Thermodynamics

In an adiabatic expansion, the temperature of one mole of an ideal monatomic gas (γ = 5/3) decreases from 60 K to 50 K. The work done by the gas in the process is: (Take the universal gas constant as R = 8.3 J mol-1 K-1)

↻ Repeated question — also appeared in 2026 (3 sets)

A. 41.5 J
B. 83 J
C. 124.5 J
D. 166 J

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Q20 PHYSICS Unit 20: Experimental Skills

Which of the following measurements require 'index correction'?

↻ Repeated question — also appeared in 2026 (1 set)

A. Measurement of resistance of a wire using meter bridge
B. Measurement of gravitational acceleration using simple pendulum
C. Measurement of focal length of lenses using optical bench
D. Measurement of speed of sound using resonance tube

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Q24 PHYSICS Unit 7: Properties of Solids and Liquids

The temperature of a metallic sphere of radius R is increased by a small amount ΔT. If the linear coefficient of thermal expansion of the metal is α, the approximate increase in the volume of the sphere is:

↻ Repeated question — also appeared in 2026 (1 set)

A. 2πR³αΔT
B. 3πR³αΔT
C. 4πR³αΔT
D. 6πR³αΔT

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Q25 PHYSICS Unit 10: Oscillations and Waves

A cylindrical cork of uniform density floats in a liquid of density ρ1. If the cork is depressed slightly and released, it oscillates harmonically with time period T. If the same cork floats in another liquid of density ρ2, then the similar oscillation has time period 2T. The value of ρ2/ρ1 is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. 4
B. 2
C. 1/2
D. 1/4

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Q26 PHYSICS Unit 1: Physics and Measurement

One main scale division of a Vernier calliper is equal to 1 mm and the number of divisions on the Vernier scale is 10. When both the jaws touch each other, the Vernier scale shifts to the left of zero of the main scale in such a way that 4th Vernier division coincides with a division of the main scale. If this Vernier calliper measures the length of a wire to be 1 cm, the actual length of the wire is:

A. 0.60 cm
B. 0.96 cm
C. 1.00 cm
D. 1.04 cm

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Q27 PHYSICS Unit 5: Rotational Motion

A solid sphere A of radius R and mass M is attached at a point to a smaller solid sphere B of radius r < R and mass m < M. Assume that the line joining their centres lies along the horizontal. The moment of inertia of the system calculated about a vertical axis passing through the centre of A is IA and that calculated about a vertical axis passing through the centre of B is IB. The difference IA - IB is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. (M-m)(R+r)²
B. (m-M)(R+r)²
C. (m-M)(R-r)²

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Q28 PHYSICS Unit 10: Oscillations and Waves

Consider a spring-mass simple harmonic oscillator in one dimension. The mass of the particle is m kg and the spring constant is k Nm⁻¹. At a given instant, the extension of the spring is x meter and the speed of the particle is v ms⁻¹. On the x-v plane, if the graph of v as a function of x is a circle, then the correct option is:

↻ Repeated question — also appeared in 2026 (3 sets)

A. k = 1/m
B. k = m
C. k = m²
D. k = √m

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Q29 PHYSICS Unit 16: Optics

The lens combination as shown in the figure, consists of two lenses, L1 and L2, of the focal lengths + 10 cm and -10 cm, respectively. The position of the image formed is:

↻ Repeated question — also appeared in 2026 (3 sets)

A. 20 cm to the left of the concave lens
B. 60 cm to the left of the concave lens
C. 30 cm to the right of the concave lens
D. 60 cm to the right of the concave lens

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Q30 PHYSICS Unit 14: Electromagnetic Induction and Alternating Currents

An ac voltage V = 220 sin(2 x 10³t) Volt is applied to a series LCR circuit. Then the current amplitude in this circuit is: (Given: L= 10 mH, C=25µF, R= 100 Ω)

↻ Repeated question — also appeared in 2026 (2 sets)

A. 2.2 A
B. 5.5 A
C. 11.0 A
D. 22.0 A

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Q34 PHYSICS Unit 11: Electrostatics

Consider a fixed uniformly charged insulating sphere with radius R and total charge +Q. A point charge -q (q<<Q) with mass m is released from rest at a distance of 3R from the centre of the charged sphere. When the point charge reaches the surface of the sphere, its speed is : (Eo is the permittivity of vacuum, neglect gravitational forces).

↻ Repeated question — also appeared in 2026 (2 sets)

A. 3Qq / (4πϵ₀mR)
B. 2Qq / (3πϵ₀mR)
C. sqrt(Qq / (3πϵ₀mR))
D. sqrt(Qq / (4πϵ₀mR))

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Q35 PHYSICS Unit 18: Atoms and Nuclei

In Geiger-Marsden experiment, the number of scattered α-particles N(θ) is plotted as a function of scattering angle θ. Which of the following options represents the correct plot ?

↻ Repeated question — also appeared in 2026 (1 set)

A. Plot 1
B. Plot 2
C. Plot 3
D. Plot 4

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Q36 PHYSICS Unit 12: Current Electricity

Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance, +α, while the other one has a negative temperature of coefficient, -α, as shown in the figure. The current through these circuits are denoted by IA and IB. At initial temperature, the resistance of the two resistors is R0. As the temperature is increased, the correct option that describes the variation of current in these circuits is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. IA remains constant while IB increases
B. IA decreases while IB increases
C. IA increases while IB decreases
D. both IA and IB remain constant

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Q38 PHYSICS Unit 15: Electromagnetic Waves

An electromagnetic wave travelling in a lossless dielectric medium having a dielectric constant, ϵr= 9, has the electric field, Ex=E0 sin (kz-2πx 10^6t) Vm^-1 where E0 is the amplitude and k is the wave vector. Among the following options, the incorrect choice is :

↻ Repeated question — also appeared in 2026 (3 sets)

A. The speed of the electromagnetic wave inside the medium is 10^8 ms^-1
B. The wavelength of the electromagnetic wave inside the medium is 300 m
C. The magnetic field is given by the relation By= (B0/v)sin(kz-2πx 10^6t) where v is the speed of the electromagnetic wave inside the medium
D. The direction of propagation of the electromagnetic wave is along +z

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Q39 PHYSICS Unit 8: Thermodynamics

One mole of an ideal monatomic gas undergoes a cyclic process as shown in the figure. The total heat supplied to the gas is :

↻ Repeated question — also appeared in 2026 (1 set)

A. 400 J
B. 500 J
C. 600 J
D. 800 J

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Q40 PHYSICS Unit 18: Atoms and Nuclei

Consider that an electron is revolving in an excited state of Hydrogen atom with velocity sqrt(25.6) x 10^5 ms^-1. The radius of the orbit is x x 10^-9 m. The value of x is : [Take the mass of electron to be 9 x 10^-31 kg, charge of electron = -1.6 x 10^-19 C and 1/(4πε₀) = 9 x 10^9 N m^2 C^-2]

A. 4
B. 3
C. 2
D. 1

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Q41 PHYSICS Unit 3: Laws of Motion

A car travels on a circular racetrack of radius 50 m, which is banked at an angle θ. If the car travels at a speed 10 ms^-1, then the wear and tear on its tyres is minimum. Taking the acceleration due to gravity to be 10 ms^-2, the value of θ is :

↻ Repeated question — also appeared in 2026 (1 set)

A. tan^-1(1/5)
B. tan^-1(2/5)
C. tan^-1(sqrt(3)/2)
D. tan^-1(2sqrt(3))

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Q42 PHYSICS Unit 19: Electronic Devices

Three identical p-n junction diodes D1, D2 and D3 are connected across a battery as shown in the figure. If the width of the depletion regions of D1, D2 and D3 are W1, W2 and W3, respectively, then the correct option is :

↻ Repeated question — also appeared in 2026 (2 sets)

A. W1 > W2 > W3
B. W3 = W1 > W2
C. W3 > W2 > W1
D. W2 > W1 = W3

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Q43 PHYSICS Unit 15: Electromagnetic Waves

The following table presents the part of the electromagnetic spectrum and their corresponding major applications. The correct option is :

A. P-I, Q-II, R-III, S-IV
B. P-I, Q-IV, R-II, S-III
C. P-II, Q-I, R-IV, S-III
D. P-II, Q-IV, R-III, S-I

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Q44 PHYSICS Unit 4: Work Energy and Power

Bob B of mass m at rest is hanging vertically from the ceiling via a massless string of length 10 m, as shown in the figure. Point mass A of mass m travelling horizontally with speed 10 ms^-1 hits bob B elastically. The bob B rises h meter after the collision. Taking the acceleration due to gravity g= 10 ms^-2 and neglecting the size of the bob, the value of h is :

↻ Repeated question — also appeared in 2026 (2 sets)

A. 8
B. 7
C. 5
D. 2.5

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Q44 PHYSICS Unit 4: Work Energy and Power

Bob B of mass m at rest is hanging vertically from the ceiling via a massless string of length 10 m, as shown in the figure. Point mass A of mass m travelling horizontally with speed 10 ms^-1 hits bob B elastically. The bob B rises h meter after the collision. Taking the acceleration due to gravity g = 10 ms^-2 and neglecting the size of the bob, the value of h is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. 8
B. 7
C. 5
D. 2.5

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Q45 PHYSICS Unit 9: Kinetic Theory of Gases

An ideal gas is made of polyatomic molecules. Each of the molecules has three translational, three rotational and f number of vibrational modes. If the ratio of heat capacities Cp/Cv of the gas is 8/7, then the value of f is :

↻ Repeated question — also appeared in 2026 (2 sets)

A. 4
B. 3
C. 2
D. 1

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Q45 PHYSICS Unit 9: Kinetic Theory of Gases

An ideal gas is made of polyatomic molecules. Each of the molecules has three translational, three rotational and f number of vibrational modes. If the ratio of heat capacities Cp/Cv of the gas is 8/7, then the value of f is:

↻ Repeated question — also appeared in 2026 (2 sets)

A. 4
B. 3
C. 2
D. 1

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Q46 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

For the following reaction sequence, choose the correct option: Benzene + (i) CH3COCl, AlCl3 (ii) NaOCl -> P + Q.

A. If P is the sodium salt of a carboxylic acid, Q is a primary alcohol.
B. P and Q are aromatic compounds.
C. If P gives a carboxylic acid on acidification, Q gives a poisonous gas on exposure to air and light.
D. Both P and Q are carbonyl compounds.

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Q47 CHEMISTRY Unit 12: Coordination Compounds

Given below are two statements: Statement-I: [Fe(ox)3]3- is chiral. Statement-II: trans-[Cr(H2O)2(ox)2]- is chiral. In light of the above statements, choose the most appropriate answer:

↻ Repeated question — also appeared in 2026 (1 set)

A. Both Statement-I and Statement-II are correct.
B. Both Statement-I and Statement-II are incorrect.
C. Statement-I is correct but Statement-II is incorrect.
D. Statement-I is incorrect but Statement-II is correct.

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Q48 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

The following carbocation is stabilized by the interaction of the empty p orbital with [Image of benzyl carbocation derivative]

A. filled σ and filled π orbitals
B. empty σ and empty π* orbitals
C. empty σ* and filled π orbitals
D. empty σ* and empty π* orbitals

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Q49 CHEMISTRY Unit 10: p-Block Elements

In potash alum, the ratio of K+ and SO4^2- ions is

A. 1 : 2
B. 2 : 1
C. 2 : 3
D. 3 : 2

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Q50 CHEMISTRY Unit 19: Biomolecules

The correct statement about peptides and proteins is

↻ Repeated question — also appeared in 2026 (2 sets)

A. Tertiary structure of proteins has two or more polypeptide subunits.
B. Only the proteins having a quaternary structure are biologically active.
C. In β-pleated sheet structures, peptide chains are held together by intermolecular hydrogen bonds.
D. In α-helices, the polypeptide chain is twisted into a left-handed screw (helix) through intramolecular hydrogen bonds.

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Q51 PHYSICS Unit 1: Physics and Measurement

The numbers 17.0145 and 21.0235 were rounded to three figures after the decimal point. The resulting numbers, respectively, are

↻ Repeated question — also appeared in 2026 (1 set)

A. 17.014 and 21.023
B. 17.015 and 21.023
C. 17.014 and 21.024
D. 17.015 and 21.024

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Q52 CHEMISTRY Unit 6: Equilibrium

The correct order of solubility of the given salts in water at 298 K is: AgBr (5.0 x 10^-13), Zn(OH)2 (1.0 x 10^-15), Hg2Cl2 (1.3 x 10^-18).

↻ Repeated question — also appeared in 2026 (1 set)

A. Hg2Cl2 > Zn(OH)2 > AgBr
B. AgBr > Zn(OH)2 > Hg2Cl2
C. Hg2Cl2 > AgBr > Zn(OH)2
D. Zn(OH)2 > AgBr > Hg2Cl2

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Q53 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties

Among the following options, the correct trend in the electron gain enthalpy is

↻ Repeated question — also appeared in 2026 (1 set)

A. F > Cl > Br > I
B. Br > Cl > F > I
C. Cl > F > Br > I
D. I > Br > Cl > F

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Q54 CHEMISTRY Unit 5: Solutions

Assertion A: For an ideal solution formed by mixing liquids P and Q, Δmix H = 0 and Δmix V = 0. Reason R: No interactions occur between P and Q.

↻ Repeated question — also appeared in 2026 (3 sets)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct but R is NOT the correct explanation of A
C. A is correct but R is not correct
D. A is not correct but R is correct

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Q55 CHEMISTRY Unit 20: Principles Related to Practical Chemistry

The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside is

A. leucine
B. threonine
C. methionine
D. serine

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Q56 CHEMISTRY Unit 7: Redox Reactions and Electrochemistry

The standard electrode potential (E^0) for the half-cell reaction Fe^3+ + e^- -> Fe^2+ at 298 K is (Given: E^0(Fe^3+/Fe) = -0.04 V and E^0(Fe^2+/Fe) = -0.44 V at 298 K)

A. +0.40 V
B. +0.76 V
C. -0.48 V
D. +0.92 V

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Q57 CHEMISTRY Unit 6: Equilibrium

In an acidic medium, 10 mL of 0.25 M oxalic acid is titrated with KMnO4 solution. If the volume of KMnO4 solution required to reach end point is 10 mL, the strength of the KMnO4 solution is

A. 0.10 M
B. 0.20 M
C. 0.25 M
D. 0.15 M

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Q58 CHEMISTRY Unit 12: Coordination Compounds

According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength is

↻ Repeated question — also appeared in 2026 (2 sets)

A. CO > NH3 > H2O > Cl^-
B. CO > H2O > NH3 > Cl^-
C. Cl^- > H2O > NH3 > CO
D. Cl^- > NH3 > H2O > CO

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Q59 PHYSICS Unit 8: Thermodynamics

Two moles of an ideal gas undergo free expansion from 10 L to 100 L at 300 K. The values of ΔS_system and ΔS_surroundings are (R is universal gas constant)

A. ΔS_system = 0; ΔS_surroundings = 0
B. ΔS_system = 4.606 R; ΔS_surroundings = -4.606 R
C. ΔS_system = 0; ΔS_surroundings = 4.606 R
D. ΔS_system = 4.606 R; ΔS_surroundings = 0

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Q60 CHEMISTRY Unit 8: Chemical Kinetics

2A -> B is a zero-order reaction, where k = 1.0 mol L^-1 min^-1. If the initial concentration of A is 2 M, then the time taken to complete 75% of the reaction will be

↻ Repeated question — also appeared in 2026 (2 sets)

A. 1.5 min
B. 0.75 min
C. 1.0 min
D. 2.0 min

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Q69 PHYSICS Unit 8: Thermodynamics

Consider the reversible processes for 1.0 mol of an ideal gas as shown in the figure. Processes 2 and 4 are adiabatic. w1, w2, w3 and w4 represent work done (in calories) in the processes 1, 2, 3 and 4, respectively; ΔU2 and ΔU4 are changes in the internal energy for the processes 2 and 4, respectively. [use R = 2 cal K-1 mol-1]. The correct option is:

↻ Repeated question — also appeared in 2026 (1 set)

A. w1 + w3 = -2T1 ln(V2/V1) - 2T2 ln(V4/V3)
B. w2 + w4 = ΔU2 - ΔU4
C. w1 + w2 = 2T1 ln(V2/V1)
D. w1 + w2 + w3 + w4 = 0

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Q70 CHEMISTRY Unit 9: Classification of Elements and Periodicity in Properties

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The first ionization enthalpy of O is lower than that of N and F. Reason R: The loss of an electron from O leads to stable half-filled p orbital. In light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both A and R are correct and R is the correct explanation of A.
B. Both A and R are correct and R is NOT the correct explanation of A.
C. A is correct but R is not correct.
D. A is not correct but R is correct.

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Q71 CHEMISTRY Unit 5: Solutions

Consider the following statements about the solutions formed by mixing two liquids. A. An ideal solution thus formed obeys Raoult's law throughout the composition range. B. Mixture of chloroform and acetone shows negative deviation from Raoult's law. C. Mixture of aniline and phenol shows positive deviation from Raoult's law.

↻ Repeated question — also appeared in 2026 (1 set)

A. A and B only
B. B and C only
C. A only
D. A and C only

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Q72 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

One of the products formed in the following reaction is: [reaction involving cyclohexyl magnesium bromide and cyclohexyl amine]

A. N-cyclohexylcyclohexanamine (dicyclohexylamine)
B. ...
C. ...
D. ...

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Q73 CHEMISTRY Unit 10: p-Block Elements

The correct statement is:

↻ Repeated question — also appeared in 2026 (1 set)

A. Boron has a maximum covalency of four.
B. Beryllium has three valence orbitals.
C. Magnesium has a maximum covalency of four.
D. Aluminium has five valence orbitals.

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Q74 PHYSICS Unit 8: Thermodynamics

A protein undergoes reversible thermal denaturation from its initial state N to denatured state D according to N ⇌ D. At 60 °C, the concentrations of both N and D are equal at equilibrium, and the standard enthalpy change of denaturation is 666 kJ mol-1. The standard entropy change (ΔS0 in kJ K-1mol-1) of the protein upon denaturation at 60 °C is closest to:

A. 2.0
B. 2000.0
C. 333.0
D. 11.1

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Q83 CHEMISTRY Unit 15: Hydrocarbons

Among the following, the compound having conjugated double bonds is

↻ Repeated question — also appeared in 2026 (3 sets)

A. hepta-1,3-diene
B. hepta-1,4-diene
C. hepta-1,5-diene
D. hepta-1,6-diene

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Q84 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

Given below are two statements: Statement-I : Oxidation of p-nitrotoluene with acidic KMnO4 gives an acid that is stronger than benzoic acid. Statement-II: Reduction of p-nitrotoluene with Sn/HCl followed by neutralization gives an amine that is more basic than aniline.

A. Both Statement-I and Statement-II are correct.
B. Both Statement-I and Statement-II are incorrect.
C. Statement-I is correct but Statement-II is incorrect.
D. Statement-I is incorrect but Statement-II is correct.

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Q85 CHEMISTRY Unit 10: p-Block Elements

The green paramagnetic species formed by heating KMnO4 at 513 K is

A. K2MnO4
B. Mn3O4
C. MnO
D. KO2

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Q87 CHEMISTRY Unit 12: Coordination Compounds

A 1:3 electrolyte in an aqueous solution is

↻ Repeated question — also appeared in 2026 (1 set)

A. [CoCl2(NH3)4]Cl
B. [CoCl(NH3)5]Cl2
C. [Co(NH3)6]Cl3
D. [Co(NH3)3(NO2)3]

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Q88 CHEMISTRY Unit 2: Atomic Structure

Consider the following schematic plots of orbital wavefunction (Ψr) against distance (r) from the nucleus. The figure representing two radial nodes in the orbital is

↻ Repeated question — also appeared in 2026 (2 sets)

A. A
B. B
C. C
D. D

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Q89 CHEMISTRY Unit 14: Some Basic Principles of Organic Chemistry

Arrange the following compounds in the increasing order of polarity: A. CH3CH2OCH2CH3, B. CH3CH2OH, C. CH3COCH3, D. CH3COOH

↻ Repeated question — also appeared in 2026 (1 set)

A. A < B < C < D
B. C < A < D < B
C. C < A < B < D
D. A < C < B < D

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Q90 CHEMISTRY Unit 3: Chemical Bonding and Molecular Structure

The highest occupied molecular orbital for Ne2 is

↻ Repeated question — also appeared in 2026 (2 sets)

A. π2p
B. σ2p
C. π*2p
D. σ*2p

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Q91 BIOLOGY Unit 5: Human Physiology

The number of vertebrae in a human is

↻ Repeated question — also appeared in 2026 (1 set)

A. 7
B. 12
C. 26
D. 206

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Q92 BIOLOGY Unit 1: Diversity in Living World

Symbiotic association between fungi and algae are called

↻ Repeated question — also appeared in 2026 (3 sets)

A. lichens
B. sponges
C. mycorrhiza
D. chrysophytes

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Q93 BIOLOGY Unit 3: Cell Structure and Function

Cell theory was formulated by

↻ Repeated question — also appeared in 2026 (3 sets)

A. Schleiden and Schwann
B. Robert Brown
C. Singer and Nicolson
D. Antonie Von Leeuwenhoek

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Q94 BIOLOGY Unit 3: Cell Structure and Function

Which of the following are characteristics of prokaryotic cells? (a) Ribosomes are made of 50S and 30S subunits (b) They can have plasmids (c) They contain mesosome (d) They have peroxisomes

A. (b) and (c) only
B. (a) and (c) only
C. (a), (c) and (d) only
D. (a), (b) and (c) only

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Q95 BIOLOGY Unit 5: Human Physiology

Which of the following is not a part of human central neural system?

↻ Repeated question — also appeared in 2026 (4 sets)

A. Arachnoid
B. Dura mater
C. Pia mater
D. Pericardium

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Q95 BIOLOGY Unit 5: Human Physiology

Which of the following is not a part of human central neural system?

↻ Repeated question — also appeared in 2026 (4 sets)

A. Arachnoid
B. Dura mater
C. Pia mater
D. Pericardium

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Q96 BIOLOGY Unit 3: Cell Structure and Function

Mitochondrial inner membrane encloses

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A. matrix
B. cytosol
C. mucus
D. aqueous humor

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Q96 BIOLOGY Unit 3: Cell Structure and Function

Mitochondrial inner membrane encloses ____

↻ Repeated question — also appeared in 2026 (4 sets)

A. matrix
B. cytosol
C. mucus
D. aqueous humor

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Q97 BIOLOGY Unit 3: Cell Structure and Function

Match List-I with List-II. List-I: A. Cristae, B. Cisternae, C. Thylakoids, D. Phospholipid. List-II: I. Flat membrane sacs in stroma of chloroplast, II. Infoldings in mitochondria, III. Cell membrane, IV. Disc shaped sacs in the Golgi apparatus

↻ Repeated question — also appeared in 2026 (1 set)

A. A-III, B-IV, C-I, D-II
B. A-II, B-IV, C-I, D-III
C. A-II, B-IV, C-III, D-I
D. A-IV, B-III, C-I, D-II

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Q97 BIOLOGY Unit 3: Cell Structure and Function

Match List-I with List-II. List-I List-II A. Cristae I. Flat membrane sacs in stroma of chloroplast B. Cisternae II. Infoldings in mitochondria C. Thylakoids III. Cell membrane D. Phospholipid IV. Disc shaped sacs in the Golgi apparatus Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. A-III, B-IV, C-I, D-II
B. A-II, B-IV, C-I, D-III
C. A-II, B-IV, C-III, D-I
D. A-IV, B-III, C-I, D-II

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Q98 BIOLOGY Unit 3: Cell Structure and Function

The plastid that stores xanthophyll is known as

↻ Repeated question — also appeared in 2026 (3 sets)

A. chloroplast
B. chromoplast
C. aleuroplast
D. amyloplast

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Q98 BIOLOGY Unit 3: Cell Structure and Function

The plastid that stores xanthophyll is known as ____

↻ Repeated question — also appeared in 2026 (3 sets)

A. chloroplast
B. chromoplast
C. aleuroplast
D. amyloplast

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Q99 BIOLOGY Unit 5: Human Physiology

Which of the following statements related to pituitary gland are correct? (a) It is divided anatomically into adenohypophysis and neurohypophysis (b) It secretes follicle stimulating hormone (c) It secretes melanocyte stimulating hormone (d) It does not secrete prolactin Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (3 sets)

A. (a) and (b) only
B. (a), (b) and (c) only
C. (c) and (d) only
D. (b) and (c) only

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Q100 BIOLOGY Unit 4: Plant Physiology

Photorespiration reaction catalyzed by RuBisCo is shown below: RuBP + O2 -> 3-Phosphoglycerate + X Identify "X" from the given options:

↻ Repeated question — also appeared in 2026 (3 sets)

A. Phosphoenolpyruvate
B. 2-Phosphoglycolate
C. Oxaloacetate
D. Malate

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Q111 BIOLOGY Unit 1: Diversity in Living World

Given below are two statements: Statement I: In gymnosperms, the male and female gametophytes remain within the sporangia. Statement II: In gymnosperms, seeds are not covered. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q112 BIOLOGY Unit 1: Diversity in Living World

A. A-I, B-III, C-II, D-IV
B. A-III, B-II, C-I, D-IV
C. A-II, B-I, C-IV, D-III
D. A-II, B-IV, C-I, D-III

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Q113 BIOLOGY Unit 2: Structural Organisation in Animals and Plants

Which of the following are characteristic features of Solanaceae family? (a) Flowers are bisexual and actinomorphic (b) Calyx have five sepals and are united (c) Androecium have five stamens and are epipetalous (d) Ovary is inferior Choose the correct answer from the options given below:

A. (a), (b) and (c) only
B. (d) only
C. (a) and (b) only
D. (b), (c) and (d) only

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Q115 BIOLOGY Unit 5: Human Physiology

The number of action potentials generated by sino-arterial node (SAN) in a healthy human is _____ per minute.

↻ Repeated question — also appeared in 2026 (1 set)

A. 28-30
B. 70-75
C. 100-110
D. 120-140

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Q116 BIOLOGY Unit 4: Plant Physiology

How many turns of Calvin cycle are required for the formation of three molecules of glucose?

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A. 6
B. 3
C. 1
D. 18

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Q117 BIOLOGY Unit 5: Human Physiology

Which of the following statements is incorrect?

↻ Repeated question — also appeared in 2026 (4 sets)

A. Blood coagulates in response to an injury
B. Blood clot consists of fibrins
C. Fibrin is produced from fibrinogen
D. Fibrinogen is produced from fibrin

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Q123 BIOLOGY Unit 3: Cell Structure and Function

Smooth endoplasmic reticulum

↻ Repeated question — also appeared in 2026 (4 sets)

A. has ribosomes attached to its surface
B. is the major site for the synthesis of lipids
C. is actively involved in protein synthesis
D. is a site for the synthesis of carbohydrates

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Q123 BIOLOGY Unit 3: Cell Structure and Function

Smooth endoplasmic reticulum

↻ Repeated question — also appeared in 2026 (4 sets)

A. has ribosomes attached to its surface
B. is the major site for the synthesis of lipids
C. is actively involved in protein synthesis
D. is a site for the synthesis of carbohydrates

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Q124 BIOLOGY Unit 5: Human Physiology

Which one of the following statements is incorrect?

↻ Repeated question — also appeared in 2026 (2 sets)

A. a-cells of pancreas secrete glucagon
B. a-cells of pancreas secrete insulin
C. Glucagon stimulates glycogenolysis
D. β-cells of pancreas secrete insulin

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Q124 BIOLOGY Unit 5: Human Physiology

Which one of the following statements is incorrect?

↻ Repeated question — also appeared in 2026 (2 sets)

A. a-cells of pancreas secrete glucagon
B. a-cells of pancreas secrete insulin
C. Glucagon stimulates glycogenolysis
D. β-cells of pancreas secrete insulin

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Q125 BIOLOGY Unit 1: Diversity in Living World

Genus represents _____.

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A. an individual plant or animal
B. a population of plants and animals
C. a group of closely related species
D. a group of closely related families

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Q125 BIOLOGY Unit 1: Diversity in Living World

Genus represents ____

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A. an individual plant or animal
B. a population of plants and animals
C. a group of closely related species
D. a group of closely related families

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Q126 BIOLOGY Unit 1: Diversity in Living World

Which of the following is not a prokaryote?

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A. Bacteria
B. Blue green algae
C. Mycoplasma
D. Fungi

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Q126 BIOLOGY Unit 1: Diversity in Living World

Which of the following is not a prokaryote?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Bacteria
B. Blue green algae
C. Mycoplasma
D. Fungi

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Q127 BIOLOGY Unit 4: Plant Physiology

Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Abscisic acid
B. Gibberellin
C. Indole butyric acid
D. Ethephon

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Q128 BIOLOGY Unit 3: Cell Structure and Function

The correct sequence of adult cell cycle phases is ____

↻ Repeated question — also appeared in 2026 (2 sets)

A. G1-G2-S-M
B. G1-M-G2-S
C. G1-S-G2-M
D. S-M-G2-G1

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Q130 BIOLOGY Unit 1: Diversity in Living World

Given below are two statements: Statement I: The class name Reptilia refers to creeping or crawling mode of locomotion. Statement II: All organisms belonging to Reptilia have three chambered heart. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q131 BIOLOGY Unit 6: Reproduction

Given below are two statements: Statement I: Chromosomes are fully condensed at the end of prophase I. Statement II: Meiosis I resembles mitosis. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. Both Statement I and Statement II are true
B. Both Statement I and Statement II are false
C. Statement I is correct, but Statement II is false
D. Statement I is incorrect, but Statement II is true

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Q132 BIOLOGY Unit 1: Diversity in Living World

Which of the following is not a characteristic of chordates?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Presence of notochord
B. Central nervous system is dorsal
C. Absence of gills
D. Presence of post anal part (tail)

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Q133 BIOLOGY Unit 4: Plant Physiology

Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day?

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A. 50 cm
B. 170 cm
C. 230 cm
D. 460 cm

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Q135 BIOLOGY Unit 5: Human Physiology

In frogs, the number of pairs of cranial nerves arising from the brain are

↻ Repeated question — also appeared in 2026 (2 sets)

A. 6
B. 9
C. 10
D. 12

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Q136 BIOLOGY Unit 8: Biology and Human Welfare

Which of the following is used as a clot buster?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Streptokinase
B. Penicillin
C. Cyclosporin A
D. Statins

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Q137 BIOLOGY Unit 9: Biotechnology and Its Applications

The inactive form of Bt toxin is converted to the active form in the insect gut ____

↻ Repeated question — also appeared in 2026 (3 sets)

A. due to alkaline pH
B. due to acidic pH
C. by proteases
D. by nucleases

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Q138 BIOLOGY Unit 7: Genetics and Evolution

Given below are two statements : Statement I : Down's syndrome is caused by the absence of one of the X-chromosomes. Statement II : Turner's syndrome is caused by the presence of an additional copy of the chromosomes. In the light of the above statements, choose the correct answer from the options given below :

↻ Repeated question — also appeared in 2026 (3 sets)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q138 BIOLOGY Unit 7: Genetics and Evolution

Given below are two statements: Statement I: Down's syndrome is caused by the absence of one of the X-chromosomes. Statement II: Turner's syndrome is caused by the presence of an additional copy of the chromosomes. In the light of the above statements, choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (3 sets)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q139 BIOLOGY Unit 6: Reproduction

Which of the following disease is not sexually transmitted?

A. Syphilis
B. Tuberculosis
C. Gonorrhoea
D. Genital warts

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Q139 BIOLOGY Unit 5: Human Physiology

Which of the following disease is not sexually transmitted ?

↻ Repeated question — also appeared in 2026 (2 sets)

A. Syphilis
B. Tuberculosis
C. Gonorrhoea
D. Genital warts

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Q140 BIOLOGY Unit 6: Reproduction

Sperm motility is due to ____

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A. flagellar movement
B. ciliary movement
C. amoeboid movement
D. muscular movement

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Q140 BIOLOGY Unit 6: Reproduction

Sperm motility is due to ____

↻ Repeated question — also appeared in 2026 (2 sets)

A. flagellar movement
B. ciliary movement
C. amoeboid movement
D. muscular movement

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Q141 BIOLOGY Unit 7: Genetics and Evolution

Natural selection can lead to (a) stabilisation (b) genetic drift (c) directional change (d) disruption Choose the correct answer from the options given below :

↻ Repeated question — also appeared in 2026 (1 set)

A. (a) only
B. (a), (c) and (d) only
C. (a), (b), (c) and (d)
D. (a) and (c) only

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Q142 BIOLOGY Unit 6: Reproduction

The method of directly of injecting a sperm into ovum in assisted reproductive technology is called :

↻ Repeated question — also appeared in 2026 (3 sets)

A. Gamete intra fallopian transfer (GIFT)
B. Zygote intra fallopian transfer (ZIFT)
C. Intra cytoplasmic sperm injection (ICSI)
D. Embryo transfer (ET)

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Q143 BIOLOGY Unit 6: Reproduction

Which of the following structure is not a part of the male reproductive system?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Rete testis
B. Epididymis
C. Vasa efferentia
D. Infundibulum

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Q144 BIOLOGY Unit 10: Ecology and Environment

Arrange the following in descending order of number of species in the Amazonian rain forest. (a) Plants (b) Birds (c) Fishes (d) Invertebrates (e) Mammals Choose the correct answer from the options given below :

↻ Repeated question — also appeared in 2026 (1 set)

A. (c) > (b) > (d) > (e) > (a)
B. (d) > (a) > (c) > (b) > (e)
C. (e) > (b) > (a) > (c) > (d)
D. (b) > (a) > (d) > (c) > (e)

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Q145 BIOLOGY Unit 6: Reproduction

Given below are two statements : Statement I : Ovulation is caused by LH surge leading to rupture of Graafian follicles. Statement II : Graafian follicle remaining after ovulation transform in to corpus luteum and secretes large amount of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below :

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q146 BIOLOGY Unit 10: Ecology and Environment

Which of the following are primary consumers in a food chain ?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Parasites
B. Predators
C. Herbivores
D. Carnivores

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Q147 BIOLOGY Unit 7: Genetics and Evolution

A population of diploid organisms is at Hardy-Weinberg equilibrium. If the frequency of allele A is 0.1, the frequency of AA is ____

↻ Repeated question — also appeared in 2026 (3 sets)

A. 0.01
B. 0.02
C. 0.10
D. 0.99

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Q148 BIOLOGY Unit 5: Human Physiology

Match List-I with List-II. List-I (A. Excess growth hormone, B. Luteinizing hormone, C. Vasopressin, D. Oxytocin) List-II (I. Reabsorption of water and electrolytes in kidney, II. Contraction of uterus during child birth, III. Acromegaly, IV. Ovulation) Choose the correct answer from the options given below :

↻ Repeated question — also appeared in 2026 (1 set)

A. A-III, B-IV, C-II, D-I
B. A-III, B-IV, C-I, D-II
C. A-II, B-IV, C-I, D-III
D. A-IV, B-III, C-I, D-II

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Q149 BIOLOGY Unit 5: Human Physiology

The opening between the right atrium and the right ventricle is guarded by

↻ Repeated question — also appeared in 2026 (3 sets)

A. bicuspid valve
B. tricuspid valve
C. semilunar valve
D. sino-atrial node

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Q150 BIOLOGY Unit 5: Human Physiology

Sponges exchange O2 with CO2 by

↻ Repeated question — also appeared in 2026 (2 sets)

A. simple diffusion over their entire body surfaces
B. moist cuticle
C. tracheal tubes
D. gills

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Q151 BIOLOGY Unit 6: Reproduction

How many theca are present in each lobe of a typical bilobed angiosperm anther?

↻ Repeated question — also appeared in 2026 (2 sets)

A. 2
B. 6
C. 8
D. 12

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Q152 BIOLOGY Unit 5: Human Physiology

Muscle contraction is initiated by a signal sent by the central nervous system by the release of ____

↻ Repeated question — also appeared in 2026 (2 sets)

A. acetyl choline
B. acetyl coenzyme A
C. cyclic guanine monophosphate
D. cyclic adenine monophosphate

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Q153 BIOLOGY Unit 7: Genetics and Evolution

Which of the following statements about lac-operon is correct ?

↻ Repeated question — also appeared in 2026 (2 sets)

A. Gene i is constitutively expressed
B. Lactose activates repressor to bind to the operator
C. Genes i, z, y and a share single common promoter
D. Galactose can act as an inducer of lac operon

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Q153 BIOLOGY Unit 3: Cell Structure and Function

Which of the following statements about lac-operon is correct ?

↻ Repeated question — also appeared in 2026 (1 set)

A. Gene i is constitutively expressed
B. Lactose activates repressor to bind to the operator
C. Genes i, z, y and a share single common promoter
D. Galactose can act as an inducer of lac operon

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Q154 BIOLOGY Unit 6: Reproduction

Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the eggs?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Antipodals
B. Synergids
C. Central cells
D. Polar nucleus

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Q154 BIOLOGY Unit 6: Reproduction

Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the eggs?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Antipodals
B. Synergids
C. Central cells
D. Polar nucleus

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Q155 BIOLOGY Unit 6: Reproduction

Which of the following plant produces non-albuminous seeds ?

↻ Repeated question — also appeared in 2026 (4 sets)

A. Wheat
B. Maize
C. Barley
D. Pea

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Q155 BIOLOGY Unit 6: Reproduction

Which of the following plant produces non-albuminous seeds?

↻ Repeated question — also appeared in 2026 (4 sets)

A. Wheat
B. Maize
C. Barley
D. Pea

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Q156 BIOLOGY Unit 6: Reproduction

If the diploid chromosome number of typical angiosperm is 36, what would be the chromosome number in its endosperm?

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A. 18
B. 36
C. 54
D. 72

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Q156 BIOLOGY Unit 6: Reproduction

If the diploid chromosome number of typical angiosperm is 36, what would be the chromosome number in its endosperm?

↻ Repeated question — also appeared in 2026 (4 sets)

A. 18
B. 36
C. 54
D. 72

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Q157 BIOLOGY Unit 5: Human Physiology

Which of the following statements about the reabsorption process in Henle's loop are correct? (a) The descending limb of Henle's loop is permeable to water but almost impermeable to electrolytes. (b) Urine gets concentrated in Henle's loop. (c) Reabsorption of Na+ and water takes place in Henle's loop. (d) Active or passive transport of electrolytes occurs in the ascending limb of Henle's loop. Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. (a) and (b) only
B. (b), (c) and (d) only
C. (a), (b) and (c) only
D. (a), (b) and (d) only

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Q158 BIOLOGY Unit 5: Human Physiology

Which of the following is the correct order of arrangement of vertebrate column from the head to toe?

↻ Repeated question — also appeared in 2026 (2 sets)

A. Cervical vertebra, thoracic vertebra, sacrum, lumbar vertebra
B. Sacrum, lumbar vertebra, thoracic vertebra, cervical vertebra
C. Cervical vertebra, lumbar vertebra, thoracic vertebra, sacrum
D. Cervical vertebra, thoracic vertebra, lumbar vertebra, sacrum

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Q159 BIOLOGY Unit 7: Genetics and Evolution

Which of the following is not evidence for evolution?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Convergent evolution of traits like wings of birds and butterflies
B. Paleontological evidence from fossil records
C. Embryological support for evolution as proposed by Ernst Heckel
D. Divergent evolution of anatomical structures such as forelimbs

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Q160 BIOLOGY Unit 7: Genetics and Evolution

Given below are two statements: Statement I: Modern Homo sapiens arose in Australia and moved across continents. Statement II: Homo sapiens arose around 75000 to 10000 years ago. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (3 sets)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q161 BIOLOGY Unit 10: Ecology and Environment

Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is ___ _

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A. 1 million
B. 5 million
C. 10 million
D. 100 million

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Q162 BIOLOGY Unit 9: Biotechnology and Its Applications

During PCR, primers bind to the DNA strands in the ____ step.

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A. denaturation
B. extension
C. annealing
D. ligation

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Q163 BIOLOGY Unit 10: Ecology and Environment

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The logistic growth model of populations is considered more realistic than the exponential growth model. Reason R: Resources are finite. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and Rare correct but R is not the correct explanation of A
C. A is correct but R is not correct
D. A is not correct but R is correct

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Q164 BIOLOGY Unit 7: Genetics and Evolution

Adaptive radiation in placental mammals and Australian Marsupials leading to similarity between distant species is an example of ____ _

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A. divergent evolution
B. convergent evolution
C. founder effect
D. genetic drift

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Q165 BIOLOGY Unit 8: Biology and Human Welfare

Which of the following are secondary lymphoid organs?

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A. (a) and (b) only
B. (b) and (c) only
C. (b) and (d) only
D. (a) and (d) only

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Q165 BIOLOGY Unit 5: Human Physiology

Which of the following are secondary lymphoid organs? (a) Bone marrow (b) Tonsils (c) Spleen (d) Thymus Choose the correct answer from the options given below:

A. (a) and (b) only
B. (b) and (c) only
C. (b) and (d) only
D. (a) and (d) only

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Q166 BIOLOGY Unit 6: Reproduction

Which of the following hormone is not secreted by human placenta?

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A. hCG
B. Estrogen
C. Progesterone
D. LH

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Q166 BIOLOGY Unit 6: Reproduction

Which of the following hormone is not secreted by human placenta?

↻ Repeated question — also appeared in 2026 (4 sets)

A. hCG
B. Estrogen
C. Progesterone
D. LH

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Q167 BIOLOGY Unit 3: Cell Structure and Function

Which of the following enzymes synthesizes precursor mRNA?

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A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. DNA polymerase

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Q167 BIOLOGY Unit 7: Genetics and Evolution

Which of the following enzymes synthesizes precursor mRNA?

A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. DNA polymerase

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Q168 BIOLOGY Unit 9: Biotechnology and Its Applications

Given below are two statements: Statement I: Plasmids are autonomously replicating DNA. Statement II: Plasmids are extrachromosomal DNA. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. Both Statement I and Statement II are correct
B. Both Statement I and Statement II are incorrect
C. Statement I is correct but Statement II is incorrect
D. Statement I is incorrect but Statement II is correct

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Q169 BIOLOGY Unit 7: Genetics and Evolution

For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Father: IAi and Mother: IBi
B. Father: IAi and Mother: IAi
C. Father: IBi and Mother: IBi
D. Father: IAIB and Mother: IAi

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Q170 BIOLOGY Unit 7: Genetics and Evolution

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Forelimbs of human and bats are homologous. Reason R: Forelimbs of humans and bats have similar anatomical structure. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

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Q171 BIOLOGY Unit 5: Human Physiology

Colostrum, secreted by mother during initial days of lactation, is abundant in

↻ Repeated question — also appeared in 2026 (2 sets)

A. IgG
B. IgM
C. IgA
D. IgD

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Q172 BIOLOGY Unit 10: Ecology and Environment

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Abingdon tortoise in Galapagos islands became extinct within a decade after goats were introduced. Reason R: Goats were more efficient at browsing than Abingdon tortoise. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct but R is not the correct explanation of A
C. A is correct but R is not correct
D. A is not correct but R is correct

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Q173 BIOLOGY Unit 6: Reproduction

The covering of ovum at ovulation is

↻ Repeated question — also appeared in 2026 (2 sets)

A. endometrium
B. zona radiata
C. zona pellucida
D. chorion

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Q174 BIOLOGY Unit 10: Ecology and Environment

Match List-I with List-II. List-I (Interaction Type) A. Both species are harmed B. One species is harmed and the other is benefited C. Both species are benefited D. One is benefited while the other has no effect List-II I. Predation II. Mutualism III. Competition IV. Commensalism Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. A-III, B-IV, C-II, D-I
B. A-I, B-II, C-III, D-IV
C. A-II, B-I, C-IV, D-III
D. A-III, B-I, C-II, D-IV

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Q175 BIOLOGY Unit 7: Genetics and Evolution

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In an experiment, Mendel observed that the F1 progeny plants are all tall and none are dwarf. Reason R: Stem height is a contrasting trait, with tall being dominant and dwarf being recessive. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct but R is not the correct explanation of A
C. A is correct but R is not correct
D. A is not correct but R is correct

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Q176 BIOLOGY Unit 9: Biotechnology and Its Applications

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In recombinant DNA technology, lysozyme is used for disrupting bacterial cells while cellulase is for plant cells. Reason R: Isolation of genetic material needs disruption of cells. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct but R is not the correct explanation of A
C. A is correct but R is not correct
D. A is not correct but R is correct

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Q176 BIOLOGY Unit 9: Biotechnology and Its Applications

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In recombinant DNA technology, lysozyme is used for disrupting bacterial cells while cellulase is for plant cells. Reason R: Isolation of genetic material needs disruption of cells. In the light of the above statements, choose the most appropriate answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. Both A and R are correct and R is the correct explanation of A
B. Both A and R are correct but R is not the correct explanation of A
C. A is correct but R is not correct
D. A is not correct but R is correct

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Q177 BIOLOGY Unit 8: Biology and Human Welfare

Which of the following is used as an effective sedative and painkiller for treating post-surgery patients?

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A. Interferon
B. Antibiotics
C. Morphine
D. Anti-retroviral drugs

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Q177 BIOLOGY Unit 8: Biology and Human Welfare

Which of the following is used as an effective sedative and painkiller for treating post-surgery patients?

↻ Repeated question — also appeared in 2026 (4 sets)

A. Interferon
B. Antibiotics
C. Morphine
D. Anti-retroviral drugs

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Q178 BIOLOGY Unit 10: Ecology and Environment

Which of the following statements are correct? (a) Energy flow from producers to consumers is unidirectional (b) Energy pyramid can never be inverted (c) Transfer of energy follows the 1 % law Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (2 sets)

A. (a), (b) and (c)
B. (a) and (b) only
C. (a) and (c) only
D. (b) and (c) only

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Q179 BIOLOGY Unit 8: Biology and Human Welfare

Which of the following statements is correct about Plasmodium?

↻ Repeated question — also appeared in 2026 (3 sets)

A. Reproduces sexually in liver cells
B. Reproduces sexually in RBCs
C. Gametocytes develop in mosquito gut
D. Fertilization takes place in mosquito gut

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Q180 BIOLOGY Unit 9: Biotechnology and Its Applications

Match List-I with List-II. List-I List-II A. Transformation I. Restriction enzyme B. Cloning site II. Transfer DNA to host bacteria C. Selection III. Replication D. Ori IV. Antibiotic Choose the correct answer from the options given below:

↻ Repeated question — also appeared in 2026 (1 set)

A. A-II, B-I, C-IV, D-III
B. A-I, B-II, C-IV, D-III
C. A-III, B-IV, C-II, D-I
D. A-IV, B-I, C-III, D-II

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