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Q. No.All the following are known functions of the plant growth regulator auxins except:
1. Promotion of flowering in pineapples
2. Induction of parthenocarpy in tomatoes
3. Fruit ripening in tomatoes
4.`Initiation of rooting in stem cuttings
Subtopic: Growth Hormones & Auxin | Ethylene |
84%
From NCERT
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Regarding plant growth regulators:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | Auxins are plant growth promoters |
| II: | ABA is a plant growth inhibitor |
| III: | Ethylene is largely an inhibitor of growth activities |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Growth Hormones & Auxin |
85%
From NCERT
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below
| Statement I: | The phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as dedifferentiation. |
| Statement II: | The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures is called plasticity. |
| 1. | Statement I is correct but Statement II is incorrect |
| 2. | Statement I is incorrect but Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Development | Differentiation, Dedifferentiation and Redifferentiation |
85%
From NCERT
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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: Ethylene |
69%
From NCERT
NEET - 2023
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In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as
| 1. | Senescence | 2. | Differentiation |
| 3. | Dedifferentiation | 4. | Development |
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
58%
NEET - 2023
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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 |
Subtopic: Gibberellin |
78%
From NCERT
NEET - 2023
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The phenomenon which is influenced by auxin and also played a major role in its discovery is:
1. Phototropism
2. Root initiation
3. Gravitropism
4. Apical Dominance
1. Phototropism
2. Root initiation
3. Gravitropism
4. Apical Dominance
Subtopic: Growth Hormones & Auxin | Photoperiodism (OLD NCERT) |
62%
From NCERT
NEET - 2023
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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: Auxin Function | Gibberellin | Cytokinin | Ethylene |
85%
From NCERT
NEET - 2023
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Which of the following statements is not correct?
| 1. | Phase of cell elongation of plant cells is characterized by increased vacuolation. |
| 2. | Cells in the meristematic phase of growth exhibit abundant plasmodesmatal connections |
| 3. | Plant growth is generally determinate |
| 4. | Plant growth is measurable |
Subtopic: Growth |
78%
From NCERT
NEET - 2023
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Given below are two statements:
| Assertion (A): | Plant growth is open and indeterminate. |
| Reason (R): | Plants retain the capacity for unlimited growth throughout their life. |
| 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. | Both (A) and (R) are False. |
Subtopic: Growth |
81%
From NCERT
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