If mitotic division is arrested in `G_(1)` phase of a cell cycle, then the condition Is known as -

Options

A. ` G_(2)` phase
B. S phase
C. `G_(0)` phase
D. M-phase

Answer

To answer the question regarding the condition when mitotic division is arrested in the G1 phase of the cell cycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Cell Cycle**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions and processes.

2. **Identify the Arrest Point**: The question specifies that mitotic division is arrested in the G1 phase. This means that the cell is not progressing to the S phase (where DNA synthesis occurs) or the M phase (where mitosis occurs).

3. **Determine the Consequence of Arrest**: When a cell is unable to progress from the G1 phase, it does not enter the S phase. Instead, the cell may enter a state where it is metabolically active but not dividing. This state is known as the G0 phase.

4. **Define G0 Phase**: The G0 phase is a resting or quiescent phase where cells are in a non-dividing state. Cells in G0 can remain metabolically active but do not undergo division.

5. **Conclusion**: Therefore, if mitotic division is arrested in the G1 phase, the condition is referred to as the G0 phase.

### Final Answer:
The condition when mitotic division is arrested in the G1 phase of the cell cycle is known as the **G0 phase**.

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