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Q. No.
Which plant growth regulator promotes female flowers in cucumbers, thereby, increasing the yield?
1. Auxins
2. Gibberellins
3. Cytokinin
4. Ethylene
Subtopic:  Ethylene |
 88%
Level 1: 80%+
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Match the following :

A. IAA i. Herring sperm DNA
B. ABA ii. Bolting
C. Ethylene iii. Stomatal closure
D. GA iv. Weed-free lawns
E. Cytokinins v. Ripening of fruits

Options:

A B C D E
1. iv iii v ii i
2. v iii iv ii i
3. iv i v iii ii
4. v iii ii i iv

Subtopic:  Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
 91%
Level 1: 80%+
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Which of the following is not a function of the PGR ethylene?
1. Vertical growth of seedlings
2. Swelling of axis of dicot seedlings
3. Apical hook formation in dicot seedlings
4. Fruit ripening

 
Subtopic:  Ethylene |
 75%
Level 2: 60%+
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Which PGR promotes root growth and root hair formation in plants?
1. Auxins 2. Gibberellins
3. Cytokinin 4. Ethylene
Subtopic:  Ethylene |
 71%
Level 2: 60%+
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Which of the following plant growth regulators enhances the respiration rate during ripening of the fruits?
1. ABA 2. Ethylene
3. Auxins 4. Cytokinins
Subtopic:  Ethylene |
 94%
Level 1: 80%+
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Consider the two statements:
Assertion (A): The most widely used compound as source of ethylene is ethephon.
Reason (R): Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly.
 
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; (R) is False.
4. (A) is False; (R) is True.
Subtopic:  Ethylene |
 82%
Level 1: 80%+
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Consider the given two statements:
Statement I: Ethylene helps leaves/upper parts of the shoot of deep water rice plants to remain above water.
Statement II: Ethylene promotes rapid internode/petiole elongation in deep water rice plants.
 
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect

 
Subtopic:  Ethylene |
 87%
Level 1: 80%+
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Ethylene is used to:
I: initiate flowering and for synchronising fruit-set in pineapples.
II: induce flowering in mango.
 
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

 
Subtopic:  Ethylene |
 92%
Level 1: 80%+
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