Q. No.In most situations, which of the following acts as an antagonist to GAs?
1. ABA
2. IAA
3. Kinetin
4. Ethylene
1. ABA
2. IAA
3. Kinetin
4. Ethylene
Which of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower
Which of the following statements about plant hormones is false?
| 1. | The growth of plants in nature is probably regulated by a combination of growth-stimulating and growth-inhibiting hormones. |
| 2. | Abscisic acid generally promotes growth. |
| 3. | Gibberellins stimulate cell enlargement. |
| 4. | Cytokinins promote cell division. |
At the root apex the cells of the meristematic region are not characterized by:-
| 1. | Being rich in protoplasm |
| 2. | Abundant plasmodesmatal connections |
| 3. | A cell wall that is primary in nature |
| 4. | Having small inconspicuous nuclei |
The growth of a root elongating at a constant rate will be represented by:
1. A only
2. B only
3. Both A and B
4. Neither A nor B
Fruit and leaf drop at early stages can be prevented by the application of
1. Cytokinins
2. ethylene
3. auxins
4. gibberellic acid
Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid
Cytokinin does not help in:
1. Lateral shoot growth
2. Overcoming apical dominance
3. Adventitious shoot formation
4. Promoting leaf senescence
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