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) |
85%
Level 1: 80%+
Hints
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%
Level 2: 60%+
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Hints
Consider the given two statements:
| Statement I: | In male honeybees, haploid cells divide by mitosis. |
| Statement II: | Higher plants show mitotic divisions only in diploid cells. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is incorrect. |
| 3. | Statement I is correct and Statement II is correct. |
| 4. | Statement I is incorrect and Statement II is correct. |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
58%
Level 3: 35%-60%
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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) |
60%
Level 2: 60%+
Hints
The correct chronology of stages of karyokinesis in mitosis is:
| 1. | Prophase – Anaphase – Metaphase – Telophase |
| 2. | Prophase – Metaphase – Anaphase – Telophase |
| 3. | Prophase – Metaphase – Telophase – Anaphase |
| 4. | Telophase – Anaphase – Metaphase – Prophase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
95%
Level 1: 80%+
Hints
Mitosis accomplishes:
| 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) |
| 1. | Only I is correct |
| 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%
Level 1: 80%+
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Prophase of mitosis is not characterized by:
| 1. | condensation of chromatin |
| 2. | migration of centrosomes to opposite poles |
| 3. | formation of mitotic apparatus |
| 4. | pairing of homologous chromosomes |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
71%
Level 2: 60%+
Hints
Cells at the end of prophase, when viewed under the microscope, show:
1. Nuclear envelope
2. Nucleolus
3. Mitochondria
4. Endoplasmic reticulum
1. Nuclear envelope
2. Nucleolus
3. Mitochondria
4. Endoplasmic reticulum
Subtopic: Cell Division: Mitosis (Karyokinesis) |
53%
Level 3: 35%-60%
Hints
The components of nuclear envelope are dismantled during:
| 1. | prophase and reconstructed during telophase |
| 2. | prophase and reconstructed during anaphase |
| 3. | metaphase and reconstructed during telophase |
| 4. | metaphase and reconstructed during anaphase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
85%
Level 1: 80%+
Hints
Identify the incorrect statement regarding prophase stage of mitosis:
| 1. | It follows the G2 phases of interphase. |
| 2. | It is marked by the initiation of condensation of chromosomal material. |
| 3. | The centrosome undergoes duplication during this phase in animal cells. |
| 4. | By the end of this phase, chromosomes are seen to be composed of two chromatids attached together at the centromere. |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
75%
Level 2: 60%+
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