If mitotic division is restricted in `G_(1)` phase of cell, 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 "If mitotic division is restricted in G1 phase of cell, the condition is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Cell Cycle**: The cell cycle consists of several phases, including interphase (which has G1, S, and G2 phases) and mitotic (M) phase. The G1 phase is the first gap phase where the cell grows and prepares for DNA replication.

2. **Identify the Role of G1 Phase**: During the G1 phase, the cell is metabolically active and prepares for the next phase, S phase, where DNA synthesis occurs. If the cell cannot proceed to the S phase, it cannot replicate its DNA.

3. **Recognize the Consequence of Restriction in G1 Phase**: If a cell is restricted in the G1 phase and cannot enter the S phase, it may enter a state where it is metabolically active but not dividing. This is a form of cell cycle arrest.

4. **Define the G0 Phase**: The G0 phase, also known as the quiescent phase, is a state where cells exit the cell cycle and do not actively divide. Cells in this phase can remain metabolically active but do not proliferate unless prompted to do so.

5. **Conclusion**: Therefore, if mitotic division is restricted in the G1 phase, the condition is known as the G0 phase.

### Final Answer:
If mitotic division is restricted in G1 phase of the cell, the condition is known as the **G0 phase**.

---