The solid linear cytoskeletal elements having a diameter of 6nm and made up of a single type of monomers are known as

Options

A. microtubules
B. microfilaments
C. intermediate filaments
D. lamins

Answer

To solve the question regarding the solid linear cytoskeletal elements with a diameter of 6 nm and made up of a single type of monomers, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cytoskeletal Elements**:
- Cytoskeletal elements are structural components within cells that provide support, shape, and facilitate movement. They are primarily composed of proteins.

2. **Identifying the Types of Cytoskeletal Elements**:
- There are three main types of cytoskeletal elements:
- Microfilaments
- Microtubules
- Intermediate filaments

3. **Analyzing Microfilaments**:
- Microfilaments are thin, thread-like structures.
- Diameter: Approximately 3 to 6 nanometers.
- Composition: Made up of a single type of monomer called actin.

4. **Analyzing Microtubules**:
- Microtubules are cylindrical tubes.
- Diameter: Approximately 24 nanometers.
- Composition: Made up of two types of subunits, alpha and beta tubulin.

5. **Analyzing Intermediate Filaments**:
- Intermediate filaments are thicker than microfilaments.
- Diameter: Approximately 10 nanometers.
- Composition: Made up of various types of proteins, not a single type of monomer.

6. **Conclusion**:
- Given that the question specifies a solid linear cytoskeletal element with a diameter of 6 nanometers and made up of a single type of monomer, the correct answer is **microfilament**.

### Final Answer:
The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomers are known as **microfilaments**.

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