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Tamil Nadu State Board · CLASS 12th · Microbiology

TAMIL NADU STATE BOARD CLASS 12 MICROBIOLOGY 2024

43 questions from this CLASS 12th Microbiology paper. Log in as a CLASS 12th student to view solutions.

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Q1 mcq 1 mark
Who invented Phase Contrast microscope ?
  • A. George Strokes
  • B. Robert Koch
  • C. Alexander Fleming
  • D. Frits Zernike

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Q2 mcq 1 mark
The number of ATP molecules generated from one molecule of glucose oxidiz ed in prokaryotes __________.
  • A. 34
  • B. 38
  • C. 30
  • D. 36

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Q3 mcq 1 mark
First genetically produced animal by cloning technique is __________.
  • A. Bally
  • B. Shally
  • C. Vally
  • D. Dolly

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Q4 mcq 1 mark
The minimum value of aw for the growth of the micro-organisms in foods should be around __________.
  • A. 0.78
  • B. 0.99
  • C. 0.50
  • D. 0.86

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Q5 mcq 1 mark
Which of the following chemical lack penetrating power ?
  • A. Ethylene oxide
  • B. Phenol
  • C. Beta-propiolactone
  • D. Iodine

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Q6 mcq 1 mark
B.C.G. Vaccine gives immunity against which of the following disease ?
  • A. Cholera
  • B. Syphilis
  • C. Diphtheria
  • D. Tuberculosis

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Q7 mcq 1 mark
Which of the following statement is true concerning Entamoeba histolytica ?
  • A. It is not transmitted through faecal-oral route.
  • B. It has no cystic stage.
  • C. Trophozoites live in large intestine of human.
  • D. It is non-pathogenic.

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Q8 mcq 1 mark
Tinea Barbae is also called as __________.
  • A. Barber’s itch
  • B. Athlete’s foot
  • C. Candidiasis
  • D. Onchomycosis

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Q9 mcq 1 mark
The precursor used in Penicillin production is __________.
  • A. Hydrochloric acid
  • B. Citric acid
  • C. Phenyl acetic acid
  • D. Tartaric acid

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Q10 mcq 1 mark
Identify the mismatched pair from the following :
  • A. Type III- Immune complex
  • B. Type I - Atopy
  • C. Type IV- Mantoux reaction
  • D. Type II- Arthus reaction

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Q11 mcq 1 mark
__________ sequence terminates protein synthesis.
  • A. UAG
  • B. UGA
  • C. UAA
  • D. All of the above

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Q12 mcq 1 mark
__________ is an example for mosquito-borne and tick borne viruses.
  • A. Chikungunya virus
  • B. Dengue virus
  • C. HIV virus
  • D. Flavi virus

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Q13 mcq 1 mark
__________ is called yeast like fungi.
  • A. Saccharomyces
  • B. Candida
  • C. Aspergillus
  • D. Cryptococcus

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Q14 mcq 1 mark
Enteric fever is caused by __________.
  • A. Tryponema pallidum
  • B. Escherichia coli
  • C. Salmonella typhi
  • D. Vibrio cholerae

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Q15 mcq 1 mark
__________ is an example for the smallest virus.
  • A. Rabies virus
  • B. Pox virus
  • C. HIV virus
  • D. Parvo virus

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Q16 short answer
Define Antiseptic. Give an example.

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Q17 short answer
State the methods of DNA sequencing.

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Q18 short answer
What is called freeze drying ?

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Q19 short answer
Write the applications of fluorescent microscopy.

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Q20 short answer
Define - Negribodies.

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Q21 short answer
Draw the diagram of a promastigote form of Leishmania donovani and label the parts.

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Q22 short answer
What are the types of Vectors ?

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Q23 short answer
What is opportunistic mycosis ?

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Q24 short answer
Write the names of the toxins produced by the organism causing lock jaw disease.

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Q25 short answer
Tabulate the differences between upstream and downstream fermentation process.

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Q26 short answer
Mention the characteristics of an Ideal Vector.

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Q27 short answer
Write the uses of Curd.

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Q28 short answer
Write about the prophylaxis for Diphtheria.

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Q29 short answer
Write about Chikungunya virus.

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Q30 short answer
What is black water fever ?

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Q31 short answer
Write a short note on Germ Tube test.

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Q32 short answer
What is meant by MBC and MIC test ?

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Q33 short answer
Which is acting as a biocatalyst ? Mention its uses.

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Q34 long answer
Write the differences between SEM and TEM.

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Q34 long answer
Explain Glycolysis pathway.

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Q35 long answer
Explain the various phases of Penicillin production with diagram.

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Q35 long answer
Describe the methods of Food Preservation.

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Q36 long answer
Write in detail about the life cycle of Giardia lamblia.

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Q36 long answer
Explain the structure of Hepatitis B virus.

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Q37 long answer
Explain the Direct ELISA with diagram.

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Q37 long answer
Explain the stages involved in recombinant DNA technology.

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Q38 long answer
Explain the Phenol Coefficient test.

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Q38 long answer
Explain about the toxins produced by the bacteria having grape like cluster appearance.

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