Centriole replicates during

Options

A. Interphase
B. Early prophase
C. Late prophase
D. Late telophase

Answer

To determine during which phase the centrioles replicate, we can analyze the options provided and understand the cell cycle phases.

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**:
- The cell cycle consists of interphase and the mitotic phase (M-phase). Interphase is further divided into three sub-phases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).

2. **Identifying Interphase**:
- Interphase is the phase where the cell prepares for division. It is often referred to as the resting phase, but it is actually a time of significant activity.

3. **Focusing on the S Phase**:
- During the S phase of interphase, DNA replication occurs. This is the phase where the amount of DNA in the cell is doubled.

4. **Centrioles Duplication**:
- Along with DNA replication, the S phase is also characterized by the duplication of centrioles. This is crucial for the formation of the mitotic spindle during cell division.

5. **Conclusion**:
- Therefore, the centrioles replicate during the S phase of interphase.

### Final Answer:
The centrioles replicate during **interphase**, specifically in the **S phase**.

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