- 1(current)
Q. No.Match the following concerning the activity/function and the phytohormone involved:-
| (a) | Fruit ripener | (i) | Abscisic acid |
| (b) | Herbicide | (ii) | GA 3 |
| (c) | Bolting agent | (iii) | 2, 4-D |
| (d) | Stress hormone | (iv) | Ethephon |
Select the correct option from following:-
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iv) | (ii) | (i) | (iii) |
Subtopic: Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
93%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Consider the two statements:
| Assertion (A): | Spraying sugarcane crop with gibberellins increases the yield by as much as 20 tonnes per acre. |
| Reason (R): | Spraying sugarcane crop with gibberellins increases the length of the stem. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Gibberellin |
91%
From NCERT
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Consider the two statements:
| Assertion (A): | Spraying gibberellins on the tree can extend the market period for fruits. |
| Reason (R): | Gibberellins delay senescence. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Gibberellin |
89%
From NCERT
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Match the following plant growth regulators with their functions as given in NCERT:
Options:
1. 1-B, 2-C, 3-A
2. 1-C, 2-A, 3-B
3. 1-A, 2-B, 3-C
4. 1-B, 2-A, 3-C
| Column A | Column B | ||
| 1. | Auxins | A. | Stimulate cell division and growth of lateral buds |
| 2. | Cytokinins | B. | Promote stem elongation and fruit growth |
| 3. | Gibberellins | C. | Promote cell enlargement and stem elongation |
1. 1-B, 2-C, 3-A
2. 1-C, 2-A, 3-B
3. 1-A, 2-B, 3-C
4. 1-B, 2-A, 3-C
Subtopic: Auxin Function | Gibberellin | Cytokinin |
57%
From NCERT
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Which of the following are functions of gibberellins in plants?
| 1. | Promoting seed germination, stimulating stem elongation, triggering the flowering process. |
| 2. | Enhancing the ripening of fruits, increasing root growth, promoting leaf abscission. |
| 3. | Inducing root nodulation, decreasing seed dormancy, reducing fruit set. |
| 4. | Suppressing stem growth, delaying flowering, enhancing leaf senescence. |
Subtopic: Gibberellin |
87%
From NCERT
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Consider the given two statements:
Choose the correct option.
| Assertion (A): | Gibberellic acid (GA) promotes plant growth, while abscisic acid (ABA) generally inhibits it. |
| Reason (R): | GAs are terpenes and ABA is carotenoid. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Gibberellin | Abscisic Acid |
88%
From NCERT
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How many of the following statements regarding plant growth regulators (PGRs) are correct?
1. One
2. Two
3. Three
4. Four
| I: | Auxins promote cell elongation and root growth in plants. |
| II: | Gibberellins are responsible for seed germination and stem elongation. |
| III: | Cytokinins inhibit apical dominance and promote lateral bud growth. |
| IV: | Ethylene stimulates fruit ripening and senescence in plants. |
2. Two
3. Three
4. Four
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene |
68%
From NCERT
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Match the following plant hormones with their primary functions:
| Column I | Column II | ||
| 1 | Cytokinins | A | Stimulates fruit ripening |
| 2 | Abscisic acid | B | Inhibits shoot growth and promotes seed dormancy |
| 3 | Ethylene | C | Promotes cell division in plant tissues |
| 4 | Gibberellins | D | Stimulates growth and elongation of stems and leaves |
| 1. | 1-C, 2-B, 3-D, 4-A |
| 2. | 1-D, 2-C, 3-B, 4-A |
| 3. | 1-B, 2-D, 3-C, 4-A |
| 4. | 1-C, 2-B, 3-A, 4-D |
Subtopic: Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
93%
From NCERT
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- 1(current)
Q. No.
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