During which phase of the eukaryotic cell cycle does DNA replication occur?
Answer and explanation
Correct answer: D. S phase
- Step 1: Review the stages of interphase: Gap 1 (G1), Synthesis (S), and Gap 2 (G2).
- Step 2: During the S (Synthesis) phase, nuclear DNA is completely replicated, doubling the quantity of genetic material from 2n to 4n chromatids.
Answer
S phase.
Why not the others: G1 is cell growth and organelle duplication; G2 is mitotic preparation; M phase is nuclear and cytoplasmic division.
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