Q. No.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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. Extract of vascular tissues
2. Coconut milk
3. Abscisic acid
4. Yeast extract
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. Phototropism
2. Root initiation
3. Gravitropism
4. Apical Dominance
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRemoval 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 1. | Auxin | 2. | Cytokinin |
| 3. | Ethylene | 4. | Abscisic acid |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWho coined the term 'Kinetin'?
1. Skoog and Miller
2. Darwin
3. Went
4. Kurosawa
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch 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) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRemoval 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOne of the commonly used plant growth hormone in tea plantations is:
| 1. | Abscisic acid | 2. | Zeatin |
| 3. | Indole-3- acetic acid | 4. | Ethylene |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
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