The incorrect statement is

Options

A. Centrioles form the basal body of cilia and flagella
B. Centrioles form spindle fibres during cell division in animal cells
C. The central part of the proximal region of the centriole is called hub
D. Centriole are made up of eleven peripheral fibres of tubulin

Answer

To determine the incorrect statement regarding centrioles, let's analyze each of the provided statements step by step:

1. **Statement 1**: "Centrioles form the basal body of Cilia and Flagella."
- **Analysis**: This statement is true. Centrioles are indeed involved in the formation of the basal bodies that anchor cilia and flagella, which are important for cellular movement.

2. **Statement 2**: "Centrioles form spindle fibres during cell division in animal cells."
- **Analysis**: This statement is also true. During cell division, centrioles play a crucial role in forming spindle fibers that help separate chromosomes.

3. **Statement 3**: "The central part of the proximal region of the centriole is called the hub."
- **Analysis**: This statement is true. The hub is the central part of the centriole from which the microtubules (tails) extend, and it plays a role in the organization of these structures.

4. **Statement 4**: "Centrioles are made up of 11 peripheral fibres of Tubulin."
- **Analysis**: This statement is incorrect. Centrioles are composed of 9 triplets of microtubules, not 11 peripheral fibers. Each triplet consists of three microtubules arranged in a circular pattern.

**Conclusion**: The incorrect statement is the fourth one: "Centrioles are made up of 11 peripheral fibres of Tubulin."