Fibroblast cells in our body are those that are arrested in

Options

A. `G_(0)`-phase
B. `G_(1)`-phase
C. `G_(2)`-phase
D. Yet to start division

Answer

**Step-by-Step Solution:**

1. **Understanding Fibroblast Cells**: Fibroblast cells are a type of cell found in connective tissue that play a crucial role in wound healing and the maintenance of the extracellular matrix.

2. **Cell Cycle Phases**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). There is also a resting phase known as G0.

3. **Identifying the Arrest Phase**: The question asks in which phase fibroblast cells are arrested. This means we need to identify the phase where these cells are not actively dividing.

4. **Options Analysis**:
- **G0 Phase**: This is the resting phase where cells are not actively preparing to divide.
- **G1 Phase**: This is the first growth phase where cells grow and synthesize proteins in preparation for DNA synthesis.
- **G2 Phase**: This is the second growth phase where the cell prepares for mitosis.
- **Yet to Start Division**: This option implies that the cells have not yet entered any phase of the cell cycle.

5. **Correct Answer**: Based on the information provided, fibroblast cells are arrested in the **G1 phase**. When subjected to gamma radiation, these cells stop progressing through the cell cycle and remain in this phase.

6. **Conclusion**: Therefore, the correct option is **G1 phase**.

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