Cell Cycle: Phases and Checkpoints · Zoology

Which phase occupies the longest duration in a typical animal cell cycle?

  1. Mitotic M phase
  2. G1 phase
  3. S synthesis phase
  4. G2 preparatory phase
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Correct answer: G1 phase

G1 phase is usually the longest phase, as the cell spends considerable time growing and responding to external signals. Its length can vary depending on cell type and conditions.

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