Cell Cycle Phases (G1, S, G2, M) · NCERT Biology

The decision for a cell to divide is primarily made in which phase?

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

G1 is the 'decision-making' phase. If the environment is favorable and the cell receives growth signals, it passes the G1 checkpoint to commit to DNA replication in the S phase.

Difficulty: Medium Question 17 of 20

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