Q. During which stage of the cell cycle does DNA replication occur?
✅ Correct Answer: (B)
S phase
Explanation: DNA replication occurs in S (synthesis) phase. G1 is growth before DNA replication, G2 is preparation for mitosis after replication, and M phase is mitosis/cell division — replication itself happens in S phase.
Explanation by: Mr. Dubey
DNA replication occurs in S (synthesis) phase. G1 is growth before DNA replication, G2 is preparation for mitosis after replication, and M phase is mitosis/cell division — replication itself happens in S phase.