Q. No.Research on a fungal disease of rice provided the first clues about the plant hormone
1. auxin
2. gibberellin
3. cytokinin
4. ethylene
1. auxin
2. gibberellin
3. cytokinin
4. ethylene
Subtopic: Â Gibberellin |
 94%
From NCERT
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Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?
1. Abscisic Acid
2. Indole-3-butyric Acid
3. Gibberellic Acid
4. Zeatin
1. Abscisic Acid
2. Indole-3-butyric Acid
3. Gibberellic Acid
4. Zeatin
Subtopic: Â Gibberellin |
 80%
From NCERT
NEET - 2023
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Consider the given two statements:
| Assertion (A): | Spraying juvenile conifers with GAs leads to early seed production. |
| Reason (R): | Spraying juvenile conifers with GAs hastens the maturity period. |
| 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: Â Gibberellin |
 88%
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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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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Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
1. Gibberellin
2. Ethylene
3. Abscisic acid
4. Cytokinin
Subtopic: Â Gibberellin |
 89%
From NCERT
NEET - 2020
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In order to increase the yield of sugarcane crops, which of the following plant growth regulators should be sprayed?
| 1. | Ethylene | 2. | Auxins |
| 3. | Gibberellins | 4. | Cytokinins |
Subtopic: Â Gibberellin |
 89%
From NCERT
NEET - 2019
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How many of the given statements are correct?
1. 1
2. 2
3. 3
4. 4
| I: | All Gibberellins are acidic. |
| II: | Gibberellins, cause a fruit like apple to elongate and improve its shape. |
| III: | Gibberellins delay senescence. |
| IV: | GA3 is used to speed up the malting process in brewing industry. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Â Gibberellin |
 80%
From NCERT
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One of the first gibberellins to be discovered and also the one that remains the most intensively studied form is:
| 1. | GA1 | 2. | GA2 |
| 3. | GA3 | 4. | GA4 |
Subtopic: Â Gibberellin |
 96%
From NCERT
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Consider the two statements:
| Assertion (A): | Gibberellins are used to increase the length of grape stalks. |
| Reason (R): | Gibberellins help overcome apical dominance. |
| 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: Â Gibberellin |Â Cytokinin |
 80%
From NCERT
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