How many longitudinal peripheral fibres found in a centriole :-

Options

A. 2
B. 9
C. 5
D. 7

Answer

To answer the question "How many longitudinal peripheral fibres are found in a centriole?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of a Centriole**:
- A centriole is a cylindrical structure found in most eukaryotic cells. It plays a crucial role in cell division and the formation of cilia and flagella.

2. **Composition of a Centriole**:
- Centrioles are primarily composed of a protein called tubulin, which forms microtubules.

3. **Arrangement of Microtubules**:
- In a centriole, the microtubules are arranged in a specific pattern. They are organized into 9 triplets of microtubules.

4. **Counting the Peripheral Fibres**:
- Each centriole consists of 9 triplets of microtubules. These triplets are arranged in a circular manner, forming the structure of the centriole.

5. **Conclusion**:
- Therefore, the number of longitudinal peripheral fibres found in a centriole is **9**.

### Final Answer:
The correct answer is **9**.

---