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:
|
| 75. |
Pollination by wind is called |
| A. |
anemophily | | B. |
hydrophily | | C. |
zoophily | | D. |
entomophily |
Answer: Option A
Explanation:
|
| 76. |
Pollen grains in plants are produced in |
Answer: Option C
Explanation:
|
| 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:
|
| 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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