Synapsis occurs between
1. mRNA and ribosomes
2. Spindle fibers and centromere
3. Two homologous chromosomes
4. A male and a female gamete
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The enzyme recombinase is required at which stage of meiosis ?
1. | Pachytene | 2. | Zygotene |
3. | Diplotene | 4. | Diakinesis |
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In meiosis crossing over is initiated at
1. | Pachytene | 2. | Leptotene |
3. | Zygotene | 4. | Diplotene |
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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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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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