6.2 Cell cycle and mitosis

6.2 Cell cycle and mitosis

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Question 1 of 12

1. Question
0 point(s)
What occurs during the S phase of interphase?
- Protein synthesis
- DNA replication
- Energy production
- Cell division
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Question 2 of 12

2. Question
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What is the main function of the G₁ phase in the cell cycle?
- Cytoplasmic division
- Chromosome condensation
- Cell growth and protein synthesis
- Spindle formation
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Question 3 of 12

3. Question
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Which phase follows interphase in the cell cycle?
- G₁ phase
- S phase
- G₂ phase
- M phase
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Question 4 of 12

4. Question
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What is the main function of the centromere in a chromosome?
- Replicates DNA
- Separates chromosomes during interphase
- Connects the sister chromatids
- Produces protein
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Question 5 of 12

5. Question
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What is the condensed structure of DNA visible during cell division?
- Gene
- Chromosome
- Chromatin
- Nucleotide
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Question 6 of 12

6. Question
0 point(s)
Sister chromatids have the following features except:
- Same length and shape
- Joined by centromere
- Different genetic sequences
- Formed after DNA replication
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Question 7 of 12

7. Question
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A diagram shows the G₁ phase takes 8 hours in the cell cycle. If the total interphase takes 20 hours, what is the total duration of S and G₂ phases?
- 8 hours
- 12 hours
- 16 hours
- 20 hours
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Question 8 of 12

8. Question
0 point(s)
If the S phase takes 6 hours and G₂ phase takes 6 hours, what percentage of interphase is spent in G₂ phase?
- 0.25
- 0.3
- 0.4
- 0.5
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Question 9 of 12

9. Question
0 point(s)
What is the correct sequence of phases during interphase in the cell cycle?
- G₂ phase → G₁ phase → S phase
- G₁ phase → S phase → G₂ phase
- S phase → G₂ phase → G₁ phase
- G₁ phase → G₂ phase → S phase
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Question 10 of 12

10. Question
0 point(s)
In which phase is the cell most actively involved in synthesizing proteins and accumulating energy for division?
- G₁ phase
- S phase
- G₂ phase
- M phase
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Question 11 of 12

11. Question
0 point(s)
What occurs during the G₁ phase of the cell cycle?
- DNA replication
- Cytoplasmic division
- Protein and energy synthesis
- Chromosome separation
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Question 12 of 12

12. Question
0 point(s)
Why is the G₁ phase important in the cell cycle?
- To ensure chromosomes are duplicated
- To enable active metabolic activity
- To form spindle fibers
- To control mitosis
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