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Q. No.Consider the given two statements:
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.
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.
Subtopic: Â Growth |Â Differentiation, Dedifferentiation and Redifferentiation |
 64%
From NCERT
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | Cytokinins help to initiate rooting in stem cuttings during plant propagation. |
| Statement II: | In most cases, ABA acts as a synergist to Gibberellins. |
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but 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 Hormones & Auxin |Â Gibberellin |Â Cytokinin |
From NCERT
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Redifferentiation in plants refers to:
| 1. | Meristematic cells developing into specialized tissues. |
| 2. | Xylem cells undergoing dedifferentiation to form cambium. |
| 3. | Fully mature tissues losing their ability to perform specialized functions. |
| 4. | Differentiated cells regaining the ability to divide and specialize again. |
Subtopic: Â Differentiation, Dedifferentiation and Redifferentiation |
 53%
From NCERT
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Ethylene exhibits its characteristic triple response in seedlings, which includes:
| 1. | Inhibition of stem elongation, thickening of the stem, and horizontal growth. |
| 2. | Increased leaf expansion, root elongation, and faster seed germination. |
| 3. | Acceleration of flowering, increased transpiration, and decreased chlorophyll content. |
| 4. | Suppression of fruit ripening, promotion of seed dormancy, and increased stomatal closure. |
Subtopic: Â Ethylene |
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): | 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): | 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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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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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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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 |
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