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MDCAT Biology QUESTION #11234
Question 1
During which phase of the cell cycle does DNA replication occur?
  • $G_1$ phase
  • $S$ phase✔️
  • $G_2$ phase
  • M phase
Correct Answer Explanation
DNA replication occurs during the $S$ phase (Synthesis phase) of interphase. $G_1$ is the growth phase before DNA synthesis, $G_2$ is the growth phase after DNA synthesis, and M phase is mitosis.