Multiple Choice
What occurs during the G1 phase of the cell cycle?
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11. Cell Division
Introduction to the Cell Cycle
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During which stage of the cell cycle do the chromosomes duplicate?
A
G2 phase
B
M phase
C
S phase
D
G1 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 produce new cells. 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: Chromosome duplication specifically occurs during the S phase of the cell cycle. This is when the cell synthesizes a complete copy of the DNA in its nucleus.
Differentiate between phases: Note that G1 and G2 phases are primarily for growth and preparation, while M phase is for cell division. Only the S phase is dedicated to DNA synthesis.
Conclude with the correct phase: Based on the understanding of the cell cycle, the chromosomes duplicate during the S phase, which is the correct answer.
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