- 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 |
Subtopic: Â Gibberellin |Â Cytokinin |Â Ethylene |Â Abscisic Acid |
 82%
From NCERT
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To extend their market period, fruits can be left on trees longer by the application of:
| 1. | Auxin | 2. | Gibberellins |
| 3. | Cytokinin | 4. | ABA |
Subtopic: Â Gibberellin |
 77%
From NCERT
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Hints
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NEET 2025 - Target Batch
In most situations, which PGR acts as an antagonist to GAs?
| 1. | ABA | 2. | Ethylene |
| 3. | Cytokinin | 4. | Giberrellin |
Subtopic: Â Gibberellin |Â Abscisic Acid |
 84%
From NCERT
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NEET 2025 - Target Batch
Hints
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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 |
Subtopic: Â Growth Hormones & Auxin |Â Gibberellin |Â Cytokinin |Â Ethylene |Â Abscisic Acid |
 91%
From NCERT
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To promote stem elongation, gibberellins act in concert with:
| 1. Auxins | 2. Cytokinins |
| 3. Ethylene | 4. ABA |
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |Â Gibberellin |
 53%
From NCERT
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Hints
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Consider the given two statements:
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
| I: | Spraying sugarcane crop with gibberellins increases the yield by as much as 20 tonnes per acre. |
| II: | Sugarcane stores carbohydrates as sugar in their stems and spraying sugarcane crop with gibberellins increases the length of the stem. |
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
Subtopic: Â Gibberellin |
 88%
From NCERT
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Hints
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How many of the following can be characterized as action of gibberellins on plants?
| I: | They can be used to increase the length of grape stalks. |
| II: | They can elongate and improve the shape of apple. |
| III: | They speed up malting process in brewing industry. |
| IV: | They hasten the maturity period of juvenile conifers. |
| V: | They promote bolting in many plants with rosette habit. |
| 1. 2 | 2. 3 |
| 3. 4 | 4. 5 |
Subtopic: Â Gibberellin |
 80%
From NCERT
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Hints
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Which plant growth regulator will most likely be responsible for the peculiar effect on plant as shown in the given figure?
| 1. Auxins 2. Cytokinins 3. Gibberellins 4. Ethylene |
 |
Subtopic: Â Gibberellin |
 71%
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NEET 2025 - Target Batch
Hints
- 1(current)
Q. No.
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