Q. No.Consider the given two statements:
| Statement I: | Ethylene helps leaves/upper parts of the shoot of deep water rice plants to remain above water. |
| Statement II: | Ethylene promotes rapid internode/petiole elongation in deep water rice plants. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Â Ethylene |
 86%
From NCERT
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Which plant growth regulator promotes female flowers in cucumbers, thereby, increasing the yield?
1. Auxins
2. Gibberellins
3. Cytokinin
4. Ethylene
1. Auxins
2. Gibberellins
3. Cytokinin
4. Ethylene
Subtopic: Â Ethylene |
 89%
From NCERT
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Match the following concerning the activity/function and the phytohormone involved:
| Column I | Column II | ||
| (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:
| Options: | (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: Â Growth Hormones & Auxin |Â Gibberellin |Â Ethylene |Â Abscisic Acid |
 86%
From NCERT
NEET - 2020
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It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1. Cytokinin and Abscisic acid
2. Auxin and Ethylene
3. Gibberellin and Cytokinin
4. Gibberellin and Abscisic acid
Subtopic: Â Auxin Function |Â Ethylene |
 82%
From NCERT
NEET - 2019
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Which hormone promotes internode / petiole elongation in deep water rice?
| 1. | 2, 4-D | 2. | GA3 |
| 3. | Kinetin | 4. | Ethylene |
Subtopic: Â Ethylene |
 71%
From NCERT
NEET - 2023
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NEET 2025 - Target Batch
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The plant hormone __________ delays senescence, whereas the plant hormone promotes senescence.
1. cytokinin; auxin
2. auxin; cytokinin
3. cytokinin; ethylene
4. abscisic acid; ethylene
1. cytokinin; auxin
2. auxin; cytokinin
3. cytokinin; ethylene
4. abscisic acid; ethylene
Subtopic: Â Cytokinin |Â Ethylene |
 74%
From NCERT
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Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in plants?
| 1. | Cytokinin | 2. | ABA |
| 3. | Gibberellin | 4. | Ethylene |
Subtopic: Â Ethylene |
 79%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Match List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (A) | Auxin | (I) | Promotes female flower formation in cucumber |
| (B) | Gibberellin | (II) | Overcoming apical dominance |
| (C) | Cytokinin | (III) | Increase in the length of grape stalks |
| (D) | Ethylene | (IV) | Promotes flowering in pineapple |
Choose the correct answer from the options given below:
| Options: | (A) | (B) | (C) | (D) |
| 1. | II | I | IV | III |
| 2. | IV | III | II | I |
| 3. | I | III | IV | II |
| 4. | III | II | I | IV |
Subtopic: Â Auxin Function |Â Gibberellin |Â Cytokinin |Â Ethylene |
 86%
From NCERT
NEET - 2023
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Which PGR promotes root growth and root hair formation in plants?
| 1. | Auxins | 2. | Gibberellins |
| 3. | Cytokinin | 4. | Ethylene |
Subtopic: Â Ethylene |
 72%
From NCERT
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The gaseous plant growth regulator is used in plants to:
| 1. | kill dicotyledonous weeds in the fields |
| 2. | speed up the malting process |
| 3. | promote root growth and root hair formation to increase the absorption surface |
| 4. | help overcome apical dominance |
Subtopic: Â Ethylene |
 76%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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