Who performed the experiments using canary grass to demonstrate the curvature of tip?
1. E. Kurosawa
2. F. Skoog
3. Went
4. Darwin
Subtopic: Â Growth Hormones & Auxin |
 73%
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Subtopic: Â Growth Hormones & Auxin |
 75%
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During differentiation of xylem
| 1. | End walls are lost in tracheids |
| 2. | Loss of protoplasm occurs in vessels |
| 3. | Lignified thickening develops in tracheary elements |
| 4. | More than one option is correct |
Subtopic: Â Auxin Function |
 79%
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2, 4-D is
| 1. | Widely used to kill monocots |
| 2. | Effective weedicides against broad-leaved plants |
| 3. | Used to prevent lodging and root initiation |
| 4. | Used to promote flowering in pineapple and mango |
Subtopic: Â Growth Hormones & Auxin |
 76%
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Select an incorrect statement
| 1. | Auxin promotes xylem differentiation |
| 2. | NAA is used to overcome apical dominance |
| 3. | Auxins help to prevent fruit and leaf drop at early stages |
| 4. | Auxins prevent lodging of cereals |
Subtopic: Â Growth Hormones & Auxin |Â Cytokinin |
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Auxins
| 1. | Were first isolated in agar by PaaI |
| 2. | Are synthesised using tryptophan as precursor |
| 3. | Are found always as bound with amines |
| 4. | Are synthesised in shoot apices only |
Subtopic: Â Growth Hormones & Auxin |
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Which of the following plant hormone is used to speed up the malting process in brewing industry?
1. GA3
2. Ethylene
3. Cytokinin
4. Auxin
Subtopic: Â Gibberellin |
 92%
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Foolish seedling disease is caused by a fungus. This study helped in discovery of
1. Gibberellin
2. Cytokinin
3. ABA
4. Auxin
1. Gibberellin
2. Cytokinin
3. ABA
4. Auxin
Subtopic: Â Gibberellin |
 91%
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internodal elongation in sugarcane stem is promoted by
1. Gibberellin
2. Cytokinin
3. Auxin
4. ABA
1. Gibberellin
2. Cytokinin
3. Auxin
4. ABA
Subtopic: Â Gibberellin |
 93%
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Select an incorrect match
| 1. | ABA | - Violaxanthin |
| 2. | Ethylene | - Methionine |
| 3. | GA3 | - Acetyl CoA |
| 4. | Cytokinin | - Terpenes |
Subtopic: Â Growth Hormones & Auxin |
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