One important component of cytoskeleton is

Options

A. flagellin
B. chitin
C. cartilage
D. microtubules

Answer

To solve the question "One important component of cytoskeleton is," we need to analyze the options provided and understand the components of the cytoskeleton.

### Step-by-Step Solution:

1. **Understand the Cytoskeleton**:
- The cytoskeleton is an elaborate network of filamentous protein structures present in the cytoplasm of cells. It plays a crucial role in maintaining the cell's shape, providing mechanical support, and facilitating movement.

2. **Identify the Components of the Cytoskeleton**:
- The cytoskeleton is primarily composed of three types of structures:
- **Microtubules**: These are hollow tubes made of tubulin protein. They are involved in maintaining cell shape, cell division, and intracellular transport.
- **Microfilaments**: These are thin filaments made of actin. They are involved in muscle contraction, cell motility, and maintaining cell shape.
- **Intermediate Filaments**: These provide structural support and stability to the cell.

3. **Evaluate the Options**:
- **Flagellin**: This protein is found in the structure of flagella, which are used for movement in certain cells, but it is not a component of the cytoskeleton.
- **Chitin**: This is a structural component of the cell wall in fungi, not part of the cytoskeleton.
- **Cartilage**: This is a type of connective tissue in animals, not a component of the cytoskeleton.
- **Microtubule**: This is indeed a key component of the cytoskeleton.

4. **Conclude the Answer**:
- Based on the analysis, the correct answer is **Microtubule**, as it is one of the main structural components of the cytoskeleton.

### Final Answer:
One important component of the cytoskeleton is **Microtubule**.

---