7
lesson pretestMultiple Choice

Pretest

Question 7 • CMS 2026-2027 Biology CREDIT RECOVERY

An error occurs when the DNA of a cell is copied. However, the cell does not divide after the error is detected. Which statement best describes the cell cycle for this cell?

Answer
A
An error during the S phase is corrected during the G2 phase.
B
An error during the G1 phase is corrected during the S phase.
C
An error during the S phase is corrected during mitosis.
D
An error during the G1 phase is corrected during the G2 phase.

Explanation

DNA is copied during the S phase, so an error made while copying DNA is an S-phase error. Before the cell divides, it passes through the G2 checkpoint, where it can detect and repair DNA problems. Therefore, the statement that an S-phase error is corrected during G2 best describes the cell cycle.

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