Cell cycle can remain arrested at :-

Options

A. `G_(1)`
B. S
C. `G_(2)`
D. M

Answer

To determine at which phase the cell cycle can remain arrested, we need to analyze the different phases of the cell cycle and their functions.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle Phases**:
- The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis).
- Each phase has specific functions:
- G1: Cell growth and preparation for DNA synthesis.
- S: DNA replication.
- G2: Further growth and preparation for mitosis.
- M: Cell division.

2. **Identifying the Arrest Point**:
- The cell cycle can be arrested at various points, but the most common point of arrest is during the G1 phase.
- In the G1 phase, the cell assesses its environment and decides whether to proceed with the cell cycle or enter a resting state known as G0 (quiescence).

3. **Evaluating the Options**:
- **Option 1: G1 Phase** - This is correct. The cell can enter G0 phase from G1, effectively pausing the cycle.
- **Option 2: S Phase** - Incorrect. The S phase is where DNA replication occurs, and cells do not typically arrest here.
- **Option 3: G2 Phase** - Incorrect. The G2 phase involves preparation for mitosis, and cells are actively preparing to divide.
- **Option 4: M Phase** - Incorrect. The M phase is where actual cell division occurs, and cells cannot be arrested here.

4. **Conclusion**:
- The cell cycle can remain arrested at the G1 phase, particularly when the cell enters the G0 phase.

### Final Answer:
The cell cycle can remain arrested at the **G1 phase**.

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