- 1(current)
Q. No.Identify the plant growth regulator that, though is largely an inhibitor but, can be placed in both plant growth promoter and plant growth inhibitor groups?
| 1. | Auxins | 2. | Gibberellins |
| 3. | Ethylene | 4. | Abscisic acid |
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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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Normally, when the seeds are mature, ethylene production increases and builds-up within the fruit, resulting in a climactic event that means:
| 1. | A sudden spurt of growth | 2. | Leaf expansion |
| 3. | Rise in respiratory rate | 4. | Death of radicle |
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Which PGR is used to initiate flowering and for synchronizing fruit set in pineapple?
| 1. | Cytokinin | 2. | ABA |
| 3. | Ethylene | 4. | GA |
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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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| 1. | ABA | 2. | IAA |
| 3. | Ethylene | 4. | GA |
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| 1. | Vertical growth of seedlings |
| 2. | Swelling of axis of dicot seedlings |
| 3. | Apical hook formation in dicot seedlings |
| 4. | Fruit ripening |
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| I: | The most widely used compound as source of ethylene is ethephon. |
| II: | Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | I is incorrect but II is correct |
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| 1. | induce flowering in mango |
| 2. | hasten fruit ripening in tomatoes and apples |
| 3. | retard abscission of flowers and fruits in cotton cherry and walnut |
| 4. | promote female flowers in cucumbers |
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- 1(current)
Q. No.
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