Multiple Choice
Chromosomes are duplicated during which phase of the cell cycle?
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11. Cell Division
Introduction to the Cell Cycle
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Chromosomes are replicated during which phase of the cell cycle?
A
G1 phase
B
S phase
C
G2 phase
D
M 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 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 the S phase: During the S phase, the cell synthesizes a complete copy of the DNA in its nucleus. This is the phase where chromosome replication occurs.
Differentiate between phases: Recognize that G1 and G2 are preparatory phases, while M phase is for cell division. Only the S phase is responsible for the actual replication of chromosomes.
Conclude with the correct phase: Based on the understanding of the cell cycle, identify that chromosomes are replicated during the S phase.
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