Dyenin is unique protein of

Options

A. Ribosome
B. Centrioles
C. Flagella
D. Nucleus

Answer

### Step-by-Step Solution:

1. **Understanding Dynein**: Dynein is a type of cytoskeletal protein. Cytoskeletal proteins are essential components of the cell's internal structure, providing support and shape.

2. **Function of Dynein**: Dynein plays a crucial role in converting ATP (adenosine triphosphate) into mechanical work. This conversion is vital for various cellular processes, especially during cell division (mitosis).

3. **Location of Dynein**: Dynein is primarily found in the fibrils of flagella. Flagella are whip-like structures that enable movement in certain cells, and they contain these fibril structures made up of dynein proteins.

4. **Analyzing the Options**:
- **Option A: Ribosome** - Ribosomes are involved in protein synthesis, not related to dynein. (Incorrect)
- **Option B: Centriole** - Centrioles are involved in cell division but do not contain dynein. (Incorrect)
- **Option C: Flagella** - This is the correct option as dynein is found in the fibrils of flagella.
- **Option D: Nucleus** - The nucleus is the control center of the cell and does not contain dynein. (Incorrect)

5. **Conclusion**: The unique protein dynein is found in the flagella, making option C the correct answer.

### Final Answer:
**C. Flagella**