Q. No.The enzyme recombinase is required at which stage of meiosis ?
1.
Pachytene
2.
Zygotene
3.
Diplotene
4.
Diakinesis
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During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C ?
1. G0 and G1
2. G1 and S
3. Only G2
4. G2 and M
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In S phase of the cell cycle
1. Amount of DNA doubles in each cell
2. Amount of DNA remains same in each cell
3. Chromosome number increases
4. Amount of DNA is reduced to half in each cell
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Arrange the following events of meiosis in correct sequence
(a) Crossing over
(b) Synapsis
(c) Terminalisation of chiasmata
(d) Disappearance of nucleolus
| 1. | (b), (c), (d), (a) | 2. | (b), (a), (d), (c) |
| 3. | (b), (a), (c), (d) | 4. | (a), (b), (c), (d) |
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A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has
1. Twice the number of chromosomes and twice the amount of DNA
2. Same number of chromosomes but twice the amount of DNA
3. Twice the number of chromosomes and four times the amount of DNA
4. Four times the number of chromosomes and twice the amount of DNA
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Which of the following is not a characteristic feature during mitosis in somatic cells?
| 1. | Spindle fibres | 2. | Disappearance of nucleolus |
| 3. | Chromosome movement | 4. | Synapsis |
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Identify the stage of mitosis shown in the given diagram:
| 1. Prophase | 2. Metaphase |
| 3. Anaphase | 4. Telophase |
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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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