General Knowledge - Biology
Exercise :: Biology - Section 1
73. |
Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of |
A. |
hormones | B. |
enzymes | C. |
proteins | D. |
vitamins |
Answer: Option B
Explanation:
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74. |
Mutation is |
A. |
a factor responsible for plant growth | B. |
a change which affects the offspring of F2 generation only | C. |
a change that is inherited | D. |
a change which affects the parents |
Answer: Option C
Explanation:
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75. |
Pollination by wind is called |
A. |
anemophily | B. |
hydrophily | C. |
zoophily | D. |
entomophily |
Answer: Option A
Explanation:
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76. |
Pollen grains in plants are produced in |
Answer: Option C
Explanation:
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77. |
Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false? |
A. |
By cyanobacteria | B. |
By electrical discharges in the atmosphere | C. |
By industrially synthesised fertilizer | D. |
By denitrification |
Answer: Option D
Explanation:
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78. |
Ptyalin is an enzyme produced in the |
A. |
salivary glands | B. |
pituitary glands | C. |
thyroid glands | D. |
pancreas |
Answer: Option A
Explanation:
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