Decision of cell division occurs at –

Options

A. Starting of`G_(1)`
B. End of ` G_(1)`
C. Initial stage of prophase
D. End of telophase

Answer

**Step-by-Step Solution:**

1. **Understanding the Cell Cycle:** The cell cycle consists of several phases, including G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions and roles in the preparation for cell division.

2. **Identifying the Decision Point for Cell Division:** The decision for a cell to divide is crucial and typically occurs at a specific checkpoint in the cell cycle. This decision is influenced by various factors, including cell size, nutrient availability, and DNA integrity.

3. **Evaluating the Options:**
- **Option 1: Starting of G1 Phase:** This option is incorrect because during the G1 phase, the cell is primarily focused on growth and preparation for DNA synthesis, not making a decision to divide.
- **Option 2: End of G1 Phase:** This is the correct answer. At the end of the G1 phase, the cell assesses whether conditions are favorable for division. If they are, the cell will proceed to the S phase to replicate its DNA.
- **Option 3: Initial Stages of Prophase:** This option is incorrect. Prophase is part of the M phase, where the cell is already committed to division.
- **Option 4: End of Telophase:** This option is also incorrect. Telophase is the final stage of mitosis, where the cell is completing division, not deciding to divide.

4. **Conclusion:** The decision for cell division occurs at the end of the G1 phase, making option 2 the correct answer.

**Final Answer:** The decision of cell division occurs at the end of the G1 phase (Option 2).

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