Mature nerve cells are incapable of cell division. These cells are probabiy in -

Options

A. `G_(1)` phase
B. The S phase
C. `G_(2)` phase
D. Mitosis

Answer

To determine in which phase mature nerve cells are likely to be found, we need to analyze the cell cycle and the behavior of these cells.

### Step-by-Step Solution:

1. **Understanding Cell Division**:
- The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis).
- Mature nerve cells are known to be incapable of cell division.

2. **Identifying the Phases**:
- In the G1 phase, the cell grows and prepares for DNA replication.
- The S phase is where DNA replication occurs.
- The G2 phase is a further preparation for mitosis.
- The M phase is where the actual division takes place.

3. **Analyzing Mature Nerve Cells**:
- Since mature nerve cells do not divide, they are likely not progressing through the cell cycle to the M phase.
- If they are not dividing, they must be in a phase where they are not preparing for division.

4. **Determining the Stopping Point**:
- If a cell is not dividing, it may be in a resting state or a phase where it is not actively preparing to replicate its DNA.
- The G1 phase is where cells can enter a resting state (G0 phase) if they are not going to divide.

5. **Conclusion**:
- Therefore, mature nerve cells are probably in the G1 phase, where they are not actively preparing for division and may have entered a quiescent state.

### Final Answer:
Mature nerve cells are probably in the **G1 phase** of the cell cycle.

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