Cells in ` G_(0)` phase :

Options

A. suspend the cell cycle
B. terminate the cell cycle
C. exit the cell cycle
D. enter the cell cycle

Answer

### Step-by-Step Solution:

1. **Understanding the G0 Phase**: The G0 phase, also known as the resting phase or quiescent phase, is a stage in the cell cycle where cells are not actively preparing to divide. It is a state of dormancy.

2. **Position in the Cell Cycle**: The G0 phase is part of the cell cycle but is distinct from the active phases such as G1, S, G2, and M. Cells can enter G0 from the G1 phase if they are not ready for division.

3. **Cell Behavior in G0 Phase**: During the G0 phase, cells may carry out their normal functions but do not undergo cell division. They can remain in this phase for an extended period, depending on the cell type and environmental conditions.

4. **Transition from G0 Phase**: If a cell in the G0 phase receives the appropriate signals (such as growth factors), it can exit G0 and re-enter the cell cycle, transitioning back into the G1 phase. If not, it remains in G0.

5. **Significance of G0 Phase**: The G0 phase is crucial for maintaining tissue homeostasis and regulating cell proliferation. It allows cells to conserve resources and avoid unnecessary division.

6. **Conclusion**: Cells in the G0 phase are in a state of dormancy and do not actively participate in the cell cycle until they receive signals to re-enter the cycle.