- 1(current)
Q. No.Which plant growth regulator is critical in breaking seed and bud dormancy in flowering plants?
1. GA
2. Cytokinin
3. Ethylene
4. ABA
1. GA
2. Cytokinin
3. Ethylene
4. ABA
From NCERT
Subtopic: Ethylene |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich plant growth regulators, respectively, prevent and promote leaf abscission in plants?
1. Auxin and Ethylene
2. Auxin and Abscisic Acid
3. Gibberellin and Cytokinin
4. Abscisic Acid and Ethylene
1. Auxin and Ethylene
2. Auxin and Abscisic Acid
3. Gibberellin and Cytokinin
4. Abscisic Acid and Ethylene
From NCERT
Subtopic: Growth Hormones & Auxin | Ethylene |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyInfluences of ethylene on dicot plants include:
1. Only I and II
2. Only III
3. Only II and III
4. I, II and III
| I: | vertical growth of seedlings |
| II: | thinning of the axis |
| III: | apical hook formation |
2. Only III
3. Only II and III
4. I, II and III
Subtopic: Ethylene |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEthylene exhibits its characteristic triple response in seedlings, which includes:
| 1. | Inhibition of stem elongation, thickening of the stem, and horizontal growth. |
| 2. | Increased leaf expansion, root elongation, and faster seed germination. |
| 3. | Acceleration of flowering, increased transpiration, and decreased chlorophyll content. |
| 4. | Suppression of fruit ripening, promotion of seed dormancy, and increased stomatal closure. |
From NCERT
Subtopic: Ethylene |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the given two statements:
| Assertion (A): | Ethylene promotes fruit ripening. |
| Reason (R): | Ethylene is a gaseous hormone that influences various aspects of plant development. |
| 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 but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Ethylene |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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