During the cell cycle associated with mitosis, during which phase is DNA replicated?

• A. G1 phase of interphase
• B. S phase of interphase
• C. Prophase of mitosis
• D. Telophase of mitosis

Answer: (B)

Verified step by step guidance

1. Understand the phases of the cell cycle, which include interphase (G1, S, G2 phases) and mitosis (prophase, metaphase, anaphase, telophase).
2. Recall that DNA replication occurs before mitosis to ensure each daughter cell receives an identical set of chromosomes.
3. Identify that DNA replication specifically takes place during the S phase (Synthesis phase) of interphase, where the cell synthesizes a complete copy of its DNA.
4. Note that the G1 phase is primarily for cell growth and preparation for DNA replication, not the replication itself.
5. Recognize that prophase and telophase are stages of mitosis, where chromosomes condense and the cell divides, respectively, but DNA replication does not occur during these phases.