What happens to cells that enter the G0 stage of the cell cycle?

• A. They enter a state of dormancy and stop dividing.
• B. They undergo apoptosis.
• C. They immediately proceed to the S phase.
• D. They continue to divide rapidly.

Answer: (A)

Verified step by step guidance

1. Understand the cell cycle: The cell cycle consists of several phases, including G1, S, G2, and M. Cells may also enter a resting phase known as G0.
2. Define the G0 phase: The G0 phase is a state where cells are not actively preparing to divide. Cells in this phase are considered quiescent or dormant.
3. Consider the characteristics of cells in G0: Cells in the G0 phase do not proceed to the S phase, where DNA replication occurs, nor do they continue to divide rapidly.
4. Differentiate between dormancy and apoptosis: Apoptosis is programmed cell death, which is different from the dormancy seen in the G0 phase.
5. Conclude the behavior of cells in G0: Cells in the G0 phase enter a state of dormancy and stop dividing, rather than undergoing apoptosis or continuing to divide.