NEET 2020 · BiologyCell cyclePrevious Year Question
Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process at the end of:
Answer: (D) G1 phase. Answer: G1 phase Solution: Cells that stop dividing exit the G1 phase to enter the quiescent stage (G0); thus G0 entry occurs at the end of G1.
- A.S phase
- B.G2 phase
- C.M phase
- D.G1 phase✓
Correct Answer
(D) G1 phase
Solution & Explanation
Answer: G1 phase Solution: Cells that stop dividing exit the G1 phase to enter the quiescent stage (G0); thus G0 entry occurs at the end of G1. It is not at the end of S, G2, or M phase — the decision to leave the cycle is taken in G1 before DNA replication commits the cell to division. NCERT Reference: Ch 10, p.122, lines 6-7 — "exit G1 phase to enter an inactive\nstage called quiescent stage (G0)"
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