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GATE 2019 BT – Question 16

Genetics, Cellular and Molecular Biology · Cell Biology: Eukaryotic cell structure, cell cycle and growth control, cell-cell communication, signalling and signal transduction · 1 mark · Multiple choice

During which phase of the eukaryotic mitotic cell cycle does DNA synthesis occur?

  1. M
  2. G₁
  3. S
  4. G₂

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Correct answer: (C) S

Explanation

S denotes the synthesis phase, when chromosomal DNA is replicated before mitosis. G₁ precedes replication and G₂ follows it; M segregates the already duplicated chromosomes. Therefore C.

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