Multiple Choice
Which are the primary stages of the cell cycle?
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11. Cell Division
Introduction to the Cell Cycle
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During which phase of the cell cycle are the chromosomes replicated?
A
G2 phase
B
G1 phase
C
M 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 synthesizes a complete copy of the DNA in its nucleus. This is the phase where chromosome replication occurs.
Recognize the importance of DNA replication: DNA replication is crucial for cell division, ensuring that each daughter cell receives an identical set of chromosomes.
Conclude that the S phase is responsible for chromosome replication, as it is the phase dedicated to synthesizing DNA.
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