- 1(current)
Q. No.Match the following plant growth regulators with their functions as given in NCERT:
Options:
1. 1-B, 2-C, 3-A
2. 1-C, 2-A, 3-B
3. 1-A, 2-B, 3-C
4. 1-B, 2-A, 3-C
| Column A | Column B | ||
| 1. | Auxins | A. | Stimulate cell division and growth of lateral buds |
| 2. | Cytokinins | B. | Promote stem elongation and fruit growth |
| 3. | Gibberellins | C. | Promote cell enlargement and stem elongation |
1. 1-B, 2-C, 3-A
2. 1-C, 2-A, 3-B
3. 1-A, 2-B, 3-C
4. 1-B, 2-A, 3-C
Subtopic: Â Auxin Function |Â Gibberellin |Â Cytokinin |
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Level 3: 35%-60%
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The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of:
1. NAA, 2, 4-D
2. GA3
3. Cytokinin
4. IAA, IBA
1. NAA, 2, 4-D
2. GA3
3. Cytokinin
4. IAA, IBA
Subtopic: Â Auxin Function |
Level 3: 35%-60%
NEET - 2013
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Consider the given two statements:
| Assertion(A): | Synthetic auxin herbicides, including 2,4-dichlorophenoxyacetic acid (2,4-D) have been developed and used for broadleaf weed control. |
| Reason(R): | Auxins are toxic to plants in large concentrations; they are most toxic to dicots and less so to monocots. |
| 1. | (A) is True; (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | (A) is False; (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: Â Auxin Function |
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Level 3: 35%-60%
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To promote stem elongation, gibberellins act in concert with:
| 1. | Auxins | 2. | Cytokinins |
| 3. | Ethylene | 4. | ABA |
Subtopic: Â Growth Hormones & Auxin |Â Auxin Function |Â Gibberellin |
 51%
Level 3: 35%-60%
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