Longest phase of cell cycle is :-

Options

A. Prophase
B. Telephase
C. `G_(1)`
D. `G_(2)`

Answer

To determine the longest phase of the cell cycle, we can analyze the different phases involved in the cell cycle and their durations.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each of these phases has a specific function and duration.

2. **Identifying the Phases**:
- **G1 Phase**: This is the first gap phase where the cell grows and synthesizes proteins and organelles. It is relatively long but not the longest.
- **S Phase**: This is the phase where DNA replication occurs. It is crucial but typically shorter than G1.
- **G2 Phase**: This phase involves further growth and preparation for mitosis. It is also shorter than G1.
- **M Phase (Mitosis)**: This is the phase where the cell divides. It is the shortest phase of the cell cycle.

3. **Analyzing Mitosis**: Mitosis is divided into several stages: prophase, metaphase, anaphase, and telophase. Among these, prophase is the longest stage of mitosis.

4. **Conclusion**: After analyzing all the phases, the longest phase of the cell cycle is the **G1 Phase**. However, if we consider the longest phase of mitosis specifically, it would be **Prophase**.

5. **Final Answer**: The longest phase of the cell cycle is **G1 Phase**. However, if the question is specifically about mitosis, then **Prophase** is the longest phase of mitosis.