Q. No.What would be the DNA content and chromosome number in a cell at the end of S phase with 2C DNA content and 2N chromosome number in G1?
1. 4C and 4N
2. 2C and 4N
3. 4C and 2N
4. 2C and 2N
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Proteins are synthesized in preparation for mitosis during:
| 1. G1 phase | 2. S phase |
| 3. G2 phase | 4. M phase |
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The cells in the quiescent stage [G0] phase of the cell cycle:
1. exit from the S phase
2. continue the events of cell cycle and complete the division
3. are metabolically active
4. cannot ever proliferate
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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 |
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The phase of the cell cycle during which DNA replication takes place is:
| 1. G1 phase | 2. S phase |
| 3. G2 phase | 4. M phase |
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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
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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
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Onion root tip has 16 chromosomes in each cell. How many chromosomes will the cell respectively have at G1 phase, after S phase and after M phase?
| 1. 16, 32, 16 | 2. 16, 32, 8 |
| 3. 16, 16, 8 | 4. 16, 16, 16 |
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Cells at the end of prophase, when viewed under the microscope, show:
| 1. | Nuclear envelope | 2. | Nucleolus |
| 3. | Mitochondria | 4. | Endoplasmic reticulum |
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