Q. No.Read the following statements on plant growth and development.
Choose the option with all correct statements
| A. | Parthenocarpy can be induced by auxins. |
| B. | Plant growth regulators can be involved in promotion as well as inhibition of growth |
| C. | Dedifferentiation is a pre-requisite for re-differentiation. |
| D. | Abscisic acid is a plant growth promoter. |
| E. | Apical dominance promotes the growth of lateral buds. |
| 1. | A, D, E only |
| 2. | B, D, E only |
| 3. | A, B, C only |
| 4. | A, C, E only |
Subtopic: Â Auxin Function |Â Abscisic Acid |Â Differentiation, Dedifferentiation and Redifferentiation |
 73%
From NCERT
NEET - 2025
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Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin
| 1. | promotes abscission of mature leaves only. |
| 2. | does not affect mature monocotyledonous plants. |
| 3. | can help in cell division in grasses, to produce growth. |
| 4. | promotes apical dominance |
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |
 71%
From NCERT
NEET - 2024
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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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Removal of apical dominance by decapitation is utilised for:
| 1. | Suppressing the activity of intercalary meristem |
| 2. | Early senescence |
| 3. | Hedge making |
| 4. | Preparing weed-free lawns |
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |
 80%
From NCERT
NEET - 2022
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Subtopic: Â Auxin Function |
 89%
From NCERT
NEET - 2021
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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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Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:
| 1. | Gibberellins prevent bolting and are inactivated. |
| 2. | Auxins prevent leaf drop at early stages. |
| 3. | Effect of auxins is removed and the growth of lateral buds is enhanced. |
| 4. | Gibberellins delay the senescence of leaves. |
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |
 83%
From NCERT
NEET - 2019
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Fruit and leaf drop at early stages can be prevented by the application of:
1. Ethylene
2. Auxins
3. Gibberellic acid
4. Cytokinins
1. Ethylene
2. Auxins
3. Gibberellic acid
4. Cytokinins
Subtopic: Â Auxin Function |
 71%
From NCERT
NEET - 2017
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You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
1. IAA and gibberellin
2. Auxin and cytokinin
3. Auxin and abscisic acid
4. Gibberellin & abscisic acid
Subtopic: Â Auxin Function |Â Cytokinin |
 84%
From NCERT
NEET - 2016
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Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |
 85%
From NCERT
AIPMT - 2009
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