Most active stage of cell cycle is :-

Options

A. Prophase
B. Metaphase
C. Telophase
D. Interphase

Answer

To determine the most active stage of the cell cycle, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**: The cell cycle consists of several phases: Interphase (which includes G1, S, and G2 phases) and the Mitotic phase (which includes prophase, metaphase, anaphase, and telophase).

2. **Evaluating Prophase**:
- Prophase is the first stage of mitosis where chromatin condenses into visible chromosomes.
- While it is an important phase, it is primarily focused on the preparation for cell division rather than active metabolic processes.
- **Conclusion**: Prophase is not the most active stage.

3. **Evaluating Metaphase**:
- Metaphase is characterized by the alignment of chromosomes at the cell's equatorial plane.
- This phase is crucial for ensuring proper chromosome separation, but it is more about organization than metabolic activity.
- **Conclusion**: Metaphase is not the most active stage.

4. **Evaluating Telophase**:
- Telophase is the final stage of mitosis where the chromosomes de-condense and the nuclear envelope re-forms around each set of chromosomes.
- This phase marks the end of mitosis, but it is not where most cellular activity occurs.
- **Conclusion**: Telophase is not the most active stage.

5. **Evaluating Interphase**:
- Interphase is the phase where the cell spends most of its life. It includes three sub-phases: G1 (cell growth), S (DNA synthesis), and G2 (preparation for mitosis).
- During interphase, the cell is actively growing, synthesizing proteins, duplicating its organelles, and replicating its DNA. This is the stage where the cell prepares for division and carries out its normal functions.
- **Conclusion**: Interphase is the most active stage of the cell cycle.

### Final Answer:
The most active stage of the cell cycle is **Interphase** (Option 4).

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