Multiple Choice
During which phase of the eukaryotic cell cycle does DNA replication occur?
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16. Cell Division
DNA Replication
Multiple Choice
During the cell cycle leading up to mitosis, in which phase is DNA replicated?
A
Prophase of mitosis
B
S phase of interphase
C
G1 phase of interphase
D
G2 phase of interphase
Verified step by step guidance1
Understand the overall structure of the cell cycle, which consists of interphase and mitotic phase (M phase). Interphase includes G1, S, and G2 phases, while mitosis includes prophase, metaphase, anaphase, and telophase.
Recall that DNA replication is the process of copying the cell's DNA to ensure each daughter cell receives an identical set of chromosomes.
Identify that DNA replication specifically occurs during the S phase (Synthesis phase) of interphase, where the cell synthesizes a complete copy of its DNA.
Note that G1 phase is primarily for cell growth and preparation for DNA synthesis, and G2 phase is for further growth and preparation for mitosis, but DNA replication does not occur in these phases.
Recognize that prophase is the first stage of mitosis, where chromosomes condense, but DNA replication has already been completed during the S phase.
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