Triplet fibrils of a centriole are tilted at an angle of

Options

A. `40^(@)`
B. `30^(@)`
C. `20^(@)`
D. `10^(@)`

Answer

To solve the question regarding the angle at which the triplet fibrils of a centriole are tilted, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of Centrioles**:
- Centrioles are cylindrical structures found in cells, primarily involved in cell division.
- Each centriole is composed of nine peripheral fibrils arranged in a circular pattern.

2. **Identifying the Fibril Composition**:
- Each of the nine peripheral fibrils is made up of three sub-fibrils, which are referred to as triplets.
- This means that each peripheral fibril has a triplet arrangement.

3. **Analyzing the Arrangement of Triplets**:
- The question asks for the angle at which these triplet fibrils are tilted relative to each other.
- It is important to note that the arrangement of these triplets is not random; they are organized in a specific geometric configuration.

4. **Finding the Correct Angle**:
- According to biological studies, the triplet fibrils of a centriole are arranged at an angle of 40 degrees with respect to one another.
- This angle is a characteristic feature of the centriole's structure.

5. **Selecting the Correct Option**:
- Given the options: A) 40°, B) 30°, C) 20°, D) 10°, the correct answer is clearly A) 40°.

### Final Answer:
The triplet fibrils of a centriole are tilted at an angle of **40 degrees**.

---