Which statement correctly identifies a phase of the cell cycle?

Which statement correctly identifies a phase of the cell cycle?

• A. G0 - resting
• B. G1 - growth
• C. S - DNA replication
• D. M - mitosis

Answer: (A)

The cell cycle includes periods of growth, DNA replication, and division, but it also includes a resting state. G0 is that resting or quiescent phase where a cell has temporarily exited the active cycle and is not preparing for DNA synthesis or mitosis. This makes the statement G0 means resting a correct description of a cell-cycle phase. In contrast, the other options describe active stages—G1 is a growth phase, S is when DNA is replicated, and M is when mitosis occurs. Recognizing G0 as a distinct state helps explain why some cells, like mature neurons, pause division and stay in this resting phase until signals push them back into the cycle.

The cell cycle includes periods of growth, DNA replication, and division, but it also includes a resting state. G0 is that resting or quiescent phase where a cell has temporarily exited the active cycle and is not preparing for DNA synthesis or mitosis. This makes the statement G0 means resting a correct description of a cell-cycle phase. In contrast, the other options describe active stages—G1 is a growth phase, S is when DNA is replicated, and M is when mitosis occurs. Recognizing G0 as a distinct state helps explain why some cells, like mature neurons, pause division and stay in this resting phase until signals push them back into the cycle.