- 1(current)
Q. No.Identify the incorrectly matched pair:
| Scientist | PGR discovery | |
| 1. | Cousins | Ethylene |
| 2. | Kurosawa | Gibberellin |
| 3. | Skoog and Miller | ABA |
| 4. | F. W. Went | Auxin |
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Which PGR stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stress?
| 1. Cytokinin | 2. Giberrellin |
| 3. ABA | 4. Ethylene |
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In most situations, which PGR acts as an antagonist to GAs?
| 1. ABA | 2. Ethylene |
| 3. Cytokinin | 4. Giberrellin |
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Match the following :
| A. IAA | i. Herring sperm DNA |
| B. ABA | ii. Bolting |
| C. Ethylene | iii. Stomatal closure |
| D. GA | iv. Weed-free lawns |
| E. Cytokinins | v. Ripening of fruits |
Options:
| A | B | C | D | E | |
| 1. | iv | iii | v | ii | i |
| 2. | v | iii | iv | ii | i |
| 3. | iv | i | v | iii | ii |
| 4. | v | iii | ii | i | iv |
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The removal or inactivation of which of the following will lead to germination of many types of dormant seeds?
| 1. ABA | 2. Ethylene |
| 3. Cytokinins | 4. Gibberellins |
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I: The PGR is ABA.
II: Chemically, it is a terpene.
III: Seed germination is inhibited by it in antagonism with gibberellin.
IV: It is also produced in the roots in response to decreased soil water potential.
| 1. Only I, II and III | 2. Only I, II and IV |
| 3. Only I, III and IV | 4. Only II, III and IV |
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- 1(current)
Q. No.
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