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Q. No.Consider the given two statements:
Assertion (A):
The interphase of the cell cycle is also called the resting phase.
Reason (R):
No metabolic activity takes place inside the cell during the interphase.
1.
(A) is True; (R) is False
2.
Both (A) and (R) are True and (R) correctly explains (A)
3.
Both (A) and (R) are True but (R) does not correctly explain (A)
4.
(A) is False; (R) is True
Subtopic: Intro to Cell Cycle & Interphase |
85%
From NCERT
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G1 phase in a cell cycle:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | corresponds to the interval between initiation of mitosis and DNA replication. |
| II: | is characterised by a metabolically active cell that grows continuously and replicates its DNA. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Intro to Cell Cycle & Interphase |
From NCERT
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Onion root tip cells have 16 chromosomes in each cell. How many chromosomes will the cell respectively have at G1 phase, after S phase, and after M phase?
1. 8, 8, 8
2. 16, 16, 32
3. 16, 16, 16
4. 16, 32, 32
1. 8, 8, 8
2. 16, 16, 32
3. 16, 16, 16
4. 16, 32, 32
Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
76%
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Karyokinesis involves four stages that are chronologically [beginning at the earliest] arranged as:
1. Prophase → Metaphase → Anaphase → Telophase
2. Telophase → Metaphase → Anaphase → Prophase
3. Prophase → Metaphase → Anaphase → Telophase
4. Telophase → Anaphase → Metaphase → Prophase
1. Prophase → Metaphase → Anaphase → Telophase
2. Telophase → Metaphase → Anaphase → Prophase
3. Prophase → Metaphase → Anaphase → Telophase
4. Telophase → Anaphase → Metaphase → Prophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
87%
From NCERT
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During mitosis, the complete disintegration of the nuclear envelope marks the start of:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
85%
From NCERT
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As each chromosome moves away from the equatorial plate during the anaphase of mitosis:
| 1. | the arms of each chromosome remain directed towards the pole and hence at the leading edge, with the centromere of the chromosome trailing behind. |
| 2. | the arms of each chromosome and the centromere remain directed towards the pole and hence at the leading edge. |
| 3. | the centromere of each chromosome remains directed towards the pole and hence at the leading edge, with the arms of the chromosome trailing behind. |
| 4. | the centromere and the arms of each chromosome do not move and remain at the metaphase plate. |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
85%
From NCERT
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Simultaneous splitting of centromeres of each chromosome during mitosis takes place during:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
95%
From NCERT
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Telophase of mitosis is characterised by all the following events, except:
| 1. | Chromosomes cluster at opposite spindle poles, and their identity is lost as discrete elements. |
| 2. | Nuclear envelope develops around the chromosome clusters at each pole, forming two daughter nuclei. |
| 3. | Nucleolus, Golgi complex and ER reform. |
| 4. | Pairing of homologous chromosomes. |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Cycle: Meiosis I |
93%
From NCERT
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Mitosis accomplishes:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | the segregation of duplicated chromosomes into daughter nuclei (karyokinesis) |
| II: | division of the cell into two daughter cells by the separation of cytoplasm (cytokinesis) |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
88%
From NCERT
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In a plant cell, cytokinesis is achieved by:
| 1. | the appearance of a furrow in the plasma membrane which gradually deepens and ultimately joins in the centre dividing the cell cytoplasm into two. |
| 2. | the appearance of the cell-plate and the formation starts in the centre of the cell and grows outward to meet the existing lateral walls. |
| 3. | the appearance of a furrow in the plasma membrane which starts in the centre of the cell and grows outward to meet the existing lateral walls. |
| 4. | the appearance of the cell-plate and the formation starts in the periphery of the cell and grows inward to meet the existing central walls. |
Subtopic: Cell Division: Mitosis (Cytokinesis) |
86%
From NCERT
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