Microfilaments were discovered by Paleviz et al, 1974. These are formed of

Options

A. actin
B. tubulin
C. myoglobin
D. myosin

Answer

**Step-by-Step Solution:**

1. **Understanding Microfilaments**: Microfilaments are structural components of the cytoskeleton in eukaryotic cells. They are also referred to as actin filaments.

2. **Discovery of Microfilaments**: Microfilaments were discovered by researchers Pallwys et al. in the year 1974. This historical context is important for understanding their significance in cell biology.

3. **Composition of Microfilaments**: Microfilaments are primarily composed of polymers of a protein called actin. This means that they are formed by the assembly of many actin molecules into long chains or filaments.

4. **Function of Microfilaments**: The main function of microfilaments is to provide structural support to the cell. They play a crucial role in maintaining the shape of the cell and are involved in various cellular processes, including movement and division.

5. **Conclusion**: Based on the information gathered, we conclude that microfilaments are formed of actin. Therefore, the correct answer to the question is that microfilaments are formed of actin.

**Final Answer**: Microfilaments are formed of actin.

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