Q5
mcq
1 mark
The enzyme which eliminates the torsional stress caused by the unwinding of double helix during the DNA replication is :
- A. Topoisomerase
- B. DNA Polymerase
- C. RNA Primase
- D. Ligase
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Q7
mcq
1 mark
Genetic engineering is :
- A. Production of alcohol by using micro-organisms.
- B. Making artificial genes.
- C. Making artificial limbs, diagnostic instruments such as ECG, EEG etc.,
- D. Hybridization of DNA of one organism to that of the others.
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Q8
mcq
1 mark
Pedogenesis refers to :
- A. Population
- B. Fossils
- C. Soil
- D. Water
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Q9
mcq
1 mark
Match List - I with List - II :
List - I List - II
(1)Sterilization of culture room (i)Macerozyme
(2)Fusion of protoplast (ii)Ethanol
(3)Solidifying agent (iii)Agar
(4)Isolation of protoplast (iv)Polyethylene Glycol
- A. (1) - (ii), (2) - (iv), (3) - (iii), (4) - (i)
- B. (1) - (i), (2) - (iv), (3) - (iii), (4) - (ii)
- C. (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
- D. (1) - (i), (2) - (ii), (3) - (iii), (4) - (iv)
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Q9
mcq
Match List - I with List - II:
- A. (1) - (ii), (2) - (iv), (3) - (iii), (4) - (i)
- B. (1) - (i), (2) - (iv), (3) - (iii), (4) - (ii)
- C. (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
- D. (1) - (i), (2) - (ii), (3) - (iii), (4) - (iv)
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Q10
mcq
1 mark
Pond is a type of :
- A. Marine ecosystem
- B. Forest ecosystem
- C. Freshwater ecosystem
- D. Grassland ecosystem
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Q11
mcq
1 mark
In which technique is Ethidium Bromide used ?
- A. Polymerase Chain Reaction
- B. Southern Blotting Technique
- C. Agarose Gel Electrophoresis
- D. Western Blotting Technique
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Q12
mcq
Which one is in descending order of a food chain ?
- A. Tertiary consumers → Secondary consumers → Primary consumers → Producers
- B. Producers → Secondary consumers → Primary consumers → Tertiary consumers
- C. Tertiary consumers → Producers → Primary consumers → Secondary consumers
- D. Tertiary consumers → Primary consumers → Secondary consumers → Producers
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Q13
mcq
Plant indicator for $SO_2$ pollution is :
- A. Gladiolus, Eucalyptus
- B. Petunia, Chrysanthemum
- C. Robinia pseudoacacia, Casuarina
- D. Lichens, Rose
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Q14
mcq
Plants having similar genotypes produced by plant breeding are called :
- A. Autopolyploid
- B. Clone
- C. Genome
- D. Haploid
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Q15
mcq
Which one of the following matches is correct ?
- A. Steveocide - Natural Sweetener
- B. Palmyra - Native of Brazil
- C. Palmyra sap - Fermented to give ethanol
- D. Saccharum - Abundant in Kanyakumari
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Q16
short answer
Name any two nutrient media that you have studied.
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Q17
short answer
Write the names of the scientists who rediscovered Mendelism.
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Q20
short answer
Name the humors that are responsible for the health of human beings.
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Q21
short answer
A person gets irritation while applying chemical dye. What would be your suggestion for alternative ?
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Q23
short answer
What is the difference between missense and nonsense mutation ?
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Q24
short answer
In a grassland ecosystem an organism of $T_3$ third trophic level derives 400 joules of energy. How much energy would be there in first trophic ($T_1$) level ? Calculate.
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Q26
long answer
Differentiate incomplete dominance with co-dominance.
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Q28
long answer
What is bioremediation ? Give an example of bioremediation.
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Q29
long answer
Give four examples of plants cultivated in commercial agroforestry.
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Q30
long answer
List out the advantages of Artificial seeds.
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Q31
long answer
Name any three plants found in Sub-Alpine forests.
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Q33
long answer
Draw and label the structure of epiphytic plant Vanda.
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Q34
long answer
(a)Bring out the inheritance of chloroplast gene with an example.
OR
(b)List out the applications of single cell protein.
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Q35
long answer
(a)Explain afforestation with case studies.
OR
(b)Explain the basic concepts involved in plant tissue culture.
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Q36
long answer
(a)With a suitable diagram explain the structure of an ovule.
OR
(b)Which is called as the “King of Spices”? Write its origin and uses.
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Q37
long answer
(a)List out the traditional methods of seed protection.
OR
(b)What is negative interaction? Tabulate its types and effects with example.
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Q38
long answer
(a)Mention the name of man-made cereal. How is it formed?
OR
(b)Shape of pyramid in a particular ecosystem is always different in shape. Explain with example.
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