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Q. No.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
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: Growth Hormones & Auxin | Auxin Function |
70%
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NEET - 2024
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Formation of interfascicular cambium from fully developed parenchyma cells is an example of
1. Redifferentiation
2. Dedifferentiation
3. Maturation
4. Differentiation
1. Redifferentiation
2. Dedifferentiation
3. Maturation
4. Differentiation
Subtopic: Differentiation, Dedifferentiation and Redifferentiation |
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NEET - 2024
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Spraying sugarcane crop with which of the following plant growth regulators, increases the length of the stem, thus, increasing the yield?
| 1. | Gibberellin | 2. | Cytokinin |
| 3. | Abscisic acid | 4. | Auxin |
Subtopic: Gibberellin |
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NEET - 2024
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Match List-I with List-II
Choose the correct answer from the options given below:
1. A-III, B-I, C-IV, D-II
2. A-II, B-III, C-IV, D-I
3. A-IV, B-II, C-I, D-III
4. A-III, B-IV, C-I, D-II
| List-I | List-II | ||
| A. | Ethylene | I. | Increase length of stem |
| B. | Cytokinins | II. | Promotion of senescence and abscission |
| C. | ABA | III. | Delaying leaf senescence |
| D. | Gibberellins | IV. | Inhibition of seed germination |
1. A-III, B-I, C-IV, D-II
2. A-II, B-III, C-IV, D-I
3. A-IV, B-II, C-I, D-III
4. A-III, B-IV, C-I, D-II
Subtopic: Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
89%
From NCERT
NEET - 2024
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F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following, except:
1. Extract of vascular tissues
2. Coconut milk
3. Abscisic acid
4. Yeast extract
1. Extract of vascular tissues
2. Coconut milk
3. Abscisic acid
4. Yeast extract
Subtopic: Growth Hormones & Auxin |
77%
From NCERT
NEET - 2024
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Given below are some statements about plant growth regulators:
Choose the correct set of statements from the ones given below:
| A. | All GAs are acidic in nature. |
| B. | Auxins are antagonists to GAs. |
| C. | Zeatin was isolated from coconut milk. |
| D. | Ethylene induces flowering in Mango. |
| E. | Abscisic acid induces parthenocarpy. |
| 1. | A,C,D | 2. | B,E |
| 3. | A,B,C | 4. | B,D,E |
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
79%
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NEET - 2024
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Match List I with List II:
Choose the correct answer from the options given below:
1. A-II, B-III, C- IV, D- I
2. A-III, B-II, C- I, D- IV
3. A-II, B-I, C- IV, D- III
4. A-II, B-I, C- III, D- IV
| List I | List II | ||
| A. | Abscisic acid | I. | Promotes female flowers in cucumber |
| B. | Ethylene | II. | Helps seeds to withstand desiccation |
| C. | Gibberellin | III. | Helps in nutrient mobilisation |
| D. | Cytokinin | IV. | Promotes bolting in beet cabbage etc |
Choose the correct answer from the options given below:
1. A-II, B-III, C- IV, D- I
2. A-III, B-II, C- I, D- IV
3. A-II, B-I, C- IV, D- III
4. A-II, B-I, C- III, D- IV
Subtopic: Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
80%
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NEET - 2024
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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 |
79%
From NCERT
NEET - 2023
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