Assertion (A): | Gibberellins are used to increase the length of grape stalks. |
Reason (R): | Gibberellins help overcome apical dominance. |
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. |
Assertion (A): | GA3 is used in brewing industry. |
Reason (R): | GA3 speeds up the malting process. |
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 |
Assertion(A): | Spraying juvenile conifers with GAs delays seed production. |
Reason(R): | Spraying juvenile conifers with GAs delays the onset of maturity period. |
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 False. |
Statement I: | Kinetin, a modified form of adenine, a purine, was discovered from the autoclaved herring sperm DNA. |
Statement II: | Search for natural substances with cytokinin-like activities led to the isolation of zeatin from corn-kernels and coconut milk. |
1. | It breaks seed and bud dormancy |
2. | It delays germination in peanut seeds |
3. | It leads to sprouting of potato tubers |
4. | It promotes rapid internode/petiole elongation in deep water rice plants |
I: | is used to initiate flowering and for synchronising fruit-set in pineapples. |
II: | induces flowering in mangoes. |
I: | retards fruit ripening in tomatoes and apples. |
II: | retards abscission in flowers and fruits in cotton, cherry, walnut. |
III: | promotes male flowers in cucumbers thereby decreasing the yield. |