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Multiple Choice
During which stage of a cell's cycle do the chromosomes replicate?
A
S phase
B
G2 phase
C
G1 phase
D
M phase
Verified step by step guidance
1
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 the synthesis phase where DNA replication occurs. G2 phase is the second gap phase where the cell prepares for mitosis. M phase is mitosis, where the cell divides.
Focus on DNA replication: The question asks about the stage where chromosomes replicate. Chromosome replication is synonymous with DNA replication.
Determine the correct phase: Since DNA replication occurs during the S phase, this is the phase where chromosomes replicate.
Review the options: Compare the understanding of the cell cycle phases with the given options to confirm that the S phase is the correct answer.