Multiple Choice
In which stage of the cell cycle do chromosomes replicate?
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11. Cell Division
Introduction to the Cell Cycle
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In which phase of the cell cycle do cells replicate their chromosomes?
A
M phase
B
G2 phase
C
G1 phase
D
S phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle consists of several phases that a cell goes through to divide and replicate. These phases are G1, S, G2, and M.
Identify the purpose of each phase: G1 phase is the first gap phase where the cell grows and prepares for DNA replication. S phase is where DNA replication occurs. G2 phase is the second gap phase where the cell prepares for mitosis. M phase is where mitosis and cytokinesis occur.
Focus on the S phase: During the S phase, the cell replicates its chromosomes. This is crucial for ensuring that each daughter cell receives an identical set of chromosomes.
Recognize the importance of chromosome replication: Chromosome replication is essential for genetic continuity and is a key event in the S phase of the cell cycle.
Conclude that the S phase is the correct answer: Based on the understanding of the cell cycle phases, the replication of chromosomes occurs specifically during the S phase.
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