Q. No.The phase of the cell cycle that lasts for the least time is the:
| 1. | G1 phase | 2. | S phase |
| 3. | G2 phase | 4. | M phase |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
84%
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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Hints
Mitosis is also called ‘equational division’ because:
| 1. | the number of chromosomes in both daughter cells are the same |
| 2. | the sum of the number of chromosomes in two daughter cells is equal to the number of chromosomes in the parent cell |
| 3. | each progeny cell receives only one set of chromosomes from the parent cell |
| 4. | the number of chromosomes in the parent and the progeny cells is the same |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
65%
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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Hints
Please attempt this question first.
Consider the given two statements:
| I: | Morphology of chromosomes is best studied at metaphase |
| II: | At this stage, a chromosome is made up of two sister chromatids, held together at the centromere |
1. Both I and II are True and II explains I
2. Both I and II are True but II does not explain I
3. I is True but II is False
4. I is False but II is True
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
50%
From NCERT
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At the metaphase plate:
| 1. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
| 2. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
| 3. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
| 4. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
76%
From NCERT
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During which stage of mitosis do the following events occur?
| I: | Centromeres split and chromatids separate |
| II: | Chromatids move to opposite poles |
| 1. | Prophase | 2. | Metaphase |
| 3. | Anaphase | 4. | Telophase |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
91%
From NCERT
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All the following key events take place during telophase of mitosis except:
1. Chromosomes cluster at the opposite spindle poles
2. Chromosomes become discrete
3. Nuclear envelope reforms
4. Nucleolus, ER and Golgi complex reform
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
61%
From NCERT
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Identify the incorrect statement regarding cytokinesis:
| 1. | Animal cells divide by cleavage furrow |
| 2. | Cell plate formation takes place during cytokinesis in plant cells |
| 3. | The cell wall formation in plant cells starts near the existing lateral walls and grows inwards |
| 4. | At cytokinesis, mitochondria and plastids are distributed between daughter cells |
Subtopic: Cell Division: Mitosis (Cytokinesis) |
81%
From NCERT
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Consider the given two statements:
1. Statement I and Statement II are correct
2. Statement I is correct but Statement II is incorrect
3. Statement I is incorrect but Statement II is correct
4. Statement I and Statement II are incorrect
| Statement I: | In animal cells, cytokinesis is achieved by the appearance of a furrow in the plasma membrane. |
| Statement II: | During cytokinesis in plant cells, the formation of the new cell wall begins with the formation of a simple precursor called the cell plate that represents the middle lamella between the walls of the two adjacent cells. |
1. Statement I and Statement II are correct
2. Statement I is correct but Statement II is incorrect
3. Statement I is incorrect but Statement II is correct
4. Statement I and Statement II are incorrect
Subtopic: Cell Division: Mitosis (Cytokinesis) |
93%
From NCERT
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