Phase of shortest duration is

Options

A. `G_(1)`
B. `G_(2)`
C. S
D. All are of almost equal duration

Answer

To determine the phase of shortest duration in the cell cycle, we need to analyze the different phases involved in interphase and their respective durations.

### Step-by-Step Solution:

1. **Understand the Cell Cycle**: The cell cycle consists of two main stages: Interphase and M-phase (mitotic phase). Interphase is the period between two successive M-phases.

2. **Identify the Phases of Interphase**: Interphase is divided into three phases:
- G1 Phase (Gap 1)
- S Phase (Synthesis)
- G2 Phase (Gap 2)

3. **Duration of Each Phase**:
- G1 Phase: This phase is primarily focused on cell growth and can last around 8 to 10 hours.
- S Phase: This phase involves DNA replication and typically lasts about 5 to 6 hours.
- G2 Phase: This phase is where the cell prepares for mitosis and is the shortest, lasting approximately 3 to 4 hours.

4. **Compare the Durations**:
- G1 Phase: 8 to 10 hours (longest)
- S Phase: 5 to 6 hours (middle duration)
- G2 Phase: 3 to 4 hours (shortest)

5. **Conclusion**: Based on the durations of each phase, the G2 phase is identified as the phase of shortest duration.

### Final Answer:
The phase of shortest duration is **G2 Phase**.

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