Identify the correct statements regarding G1 phase of the cell cycle:
I: | It is the post-mitotic gap phase |
II: | The cell is metabolically active and grows continuously |
III: | Cell replicates its DNA |
1. | Only II | 2. | I and II only |
3. | Only I | 4. | I, II and III |
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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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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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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 centrosome duplicates during:
1. Early Prophase | 2. Late Prophase |
3. S phase | 4. G2 phase |
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In G1 phase, a cell has 2N chromosome content and 2C DNA content. The chromosome and DNA content at the end of S phase in this cell would be:
1. 1N; 1C | 2. 2N; 2C |
3. 2N; 4C | 4. 4N; 4C |
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1. | The interphase lasts more than 95% of the duration of the cell cycle. |
2. | M phase starts with the nuclear division. |
3. | Interphase is the resting stage in the cell cycle where the cell is metabolically inactive. |
4. | Neurons in human body are permanently in G0 phase of the cell cycle. |
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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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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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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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