12
QuizMultiple Choice

Cell Cycle — Unit test

Question 12 • First Semester Biology

DNA replication occurs during which phase of the eukaryotic cell cycle?

Answer
A
S phase
B
G1 phase
C
G2 phase
D
M phase

Explanation

DNA replication occurs during the S phase, where “S” stands for synthesis. In this part of interphase, the cell copies its DNA so each daughter cell can receive a complete set of chromosomes. The G1 and G2 phases are mainly for growth and preparation, while M phase is when the cell divides.

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