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Q. No.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: 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
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: Growth Hormones & Auxin |
75%
From NCERT
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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
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: Growth Hormones & Auxin | Cytokinin |
73%
From NCERT
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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
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: Growth Hormones & Auxin |
55%
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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: Gibberellin |
92%
From NCERT
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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: Gibberellin |
91%
From NCERT
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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: Gibberellin |
92%
From NCERT
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Select an incorrect match
1. ABA - Violaxanthin
2. Ethylene - Methionine
3. GA3 - Acetyl CoA
2. Ethylene - Methionine
3. GA3 - Acetyl CoA
4. Cytokinin - Terpenes
Subtopic: Growth Hormones & Auxin |
73%
From NCERT
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Cytokinins help
1. To retain chlorophyll
2. In promoting cell division
3. In overcoming apical dominance
4. More than one option is correct
3. In overcoming apical dominance
4. More than one option is correct
75%
From NCERT
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Which of the following chemicals is/are derived from tRNA?
1. Kinetin
2. IAA
3. Zeatin
4. More than one option is correct
1. Kinetin
2. IAA
3. Zeatin
4. More than one option is correct
Subtopic: Growth Hormones & Auxin |
66%
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