Cell organelles replicate in/during

Options

A. M phase
B. interphase
C. `G_(0)` phase
D. Cytokinesis

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks during which phase of the cell cycle cell organelles replicate.

2. **Identifying the Phases of the Cell Cycle**: The cell cycle is divided into two main phases:
- Interphase (which includes G1, S, and G2 phases)
- M phase (mitotic phase, which includes mitosis and cytokinesis)

3. **Analyzing the Phases**:
- **M Phase**: This is the phase where actual cell division occurs. It is not the phase where organelles replicate.
- **Interphase**: This phase is crucial for cell growth and preparation for division. It is during this phase that the cell spends about 95% of its time and is where the replication of organelles occurs.
- **G0 Phase**: This is a resting phase where cells may exit the cell cycle and enter a state of differentiation. Organelles do not replicate in this phase.
- **Cytokinesis**: This is the process of cytoplasmic division following mitosis. Organelles do not replicate during this process.

4. **Conclusion**: Since organelles replicate during the interphase, specifically during the G1 and G2 phases, the correct answer is **Option B: Interphase**.

### Final Answer:
Cell organelles replicate during **Interphase**.

---