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Q. No.Which of the following correctly pairs the process with an example?
A.
Differentiation
-
The formation of xylem and phloem from meristematic tissue
B.
Dedifferentiation
-
Formation of secondary xylem
1.
Only A is correct
2.
Only B is correct
3.
Both A and B are correct
4.
Neither A nor B is correct
Subtopic: Â Differentiation, Dedifferentiation and Redifferentiation |
 51%
From NCERT
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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 |
 57%
From NCERT
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Consider the given two statements:
| Assertion (A): | Auxins promote stem elongation and inhibit growth of lateral buds |
| Reason (R): | Auxins are transported unidirectionally from the stem apex downwards. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Growth Hormones & Auxin |
From NCERT
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Which plant growth regulator is critical in breaking seed and bud dormancy in flowering plants?
1. GA
2. Cytokinin
3. Ethylene
4. ABA
1. GA
2. Cytokinin
3. Ethylene
4. ABA
Subtopic: Â Ethylene |
From NCERT
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Which plant growth regulators, respectively, prevent and promote leaf abscission in plants?
1. Auxin and Ethylene
2. Auxin and Abscisic Acid
3. Gibberellin and Cytokinin
4. Abscisic Acid and Ethylene
1. Auxin and Ethylene
2. Auxin and Abscisic Acid
3. Gibberellin and Cytokinin
4. Abscisic Acid and Ethylene
Subtopic: Â Growth Hormones & Auxin |Â Ethylene |
From NCERT
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Consider the given two statements:
| Assertion (A): | Ethylene promotes fruit ripening. |
| Reason (R): | Ethylene is a gaseous hormone that influences various aspects of plant development. |
| 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 but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Â Ethylene |
 57%
From NCERT
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Consider the given two statements:
| Assertion (A): | Cytokinins are synthesized in roots and transported to other parts of the plant. |
| Reason (R): | Cytokinins promote cell division and differentiation. |
| 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 but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Â Cytokinin |
 56%
From NCERT
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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 |
 59%
From NCERT
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Consider the given two statements:
Which of the following is correct?
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
| Statement I: | Differentiation in plant cells is an irreversible process, under normal condition, where cells acquire specific structures to perform specialized functions. |
| Statement II: | Dedifferentiation in plants occurs when previously differentiated cells regain the capacity to divide under certain conditions, forming meristematic tissues like cork cambium. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Â Growth |Â Differentiation, Dedifferentiation and Redifferentiation |
 64%
From NCERT
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Influences of ethylene on dicot plants include:
1. Only I and II
2. Only III
3. Only II and III
4. I, II and III
| I: | vertical growth of seedlings |
| II: | thinning of the axis |
| III: | apical hook formation |
2. Only III
3. Only II and III
4. I, II and III
Subtopic: Â Ethylene |
 52%
From NCERT
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