- A G1 phase, preparing for DNA synthesis
- B S phase, during DNA synthesis
- C G0 phase (quiescent state)
- D G2 phase, preparing for mitosis
Correct answer: C. G0 phase (quiescent state)
Explanation: G0 phase: cells exit the cell cycle and enter a quiescent state. Many differentiated cells (neurons, muscle) are in G0.
Concept context
Mitosis and meiosis: how cells divide for growth, repair, and reproduction.