volume_mute
During which phase of the cell cycle does DNA replication occur?
publish date: 2026/06/16 11:28:14.512290 UTC
volume_mute
Before a cell can divide, it must first duplicate all of its genetic material.
During which phase does DNA replication take place?
Correct Answer
Interphase
Explanation
DNA replication occurs during interphase - the period between cell divisions. Specifically, it takes place during the S phase (synthesis phase) of interphase. By the time mitosis or meiosis begins, each chromosome has already been duplicated and consists of two identical sister chromatids joined at the centromere.
Reference
Biology: A Self-Teaching Guide