Which stage is most associated with a cell that is unable to divide again, such as a muscle or nerve cell?

Options

A. M phase
B. `G_1` phase
C. `G_2` phase
D. `G_0` Phase

Answer

To determine which stage is most associated with a cell that is unable to divide again, such as a muscle or nerve cell, we can analyze the options provided:

1. **Understanding Cell Cycle Phases**:
- The cell cycle consists of several phases: G1, S, G2, and M.
- G1 (Gap 1) is the phase where the cell grows and prepares for DNA replication.
- S (Synthesis) is where DNA replication occurs.
- G2 (Gap 2) is where the cell prepares for mitosis.
- M (Mitosis) is the phase where cell division occurs.

2. **Identifying Non-Dividing Cells**:
- Muscle cells and nerve cells (neurons) are examples of cells that typically do not divide after they have fully differentiated.
- These cells often exit the cell cycle and enter a resting or quiescent state.

3. **Identifying the Correct Phase**:
- The phase where cells exit the cycle and do not divide is known as the G0 phase.
- Cells in G0 are in a state of dormancy or quiescence and are not actively preparing to divide.

4. **Conclusion**:
- Therefore, the stage most associated with a cell that is unable to divide again, such as a muscle or nerve cell, is the **G0 phase**.

**Final Answer**: G0 phase (Option D)

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