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Each 'F' actin of thin filaments is a po...

Each 'F' actin of thin filaments is a polymer of

A

G' actin

B

M' actin

C

C' actin

D

D, actin

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding F-actin**: F-actin, or filamentous actin, is a crucial component of the thin filaments in muscle fibers. It plays a significant role in muscle contraction and cellular movement. 2. **Composition of F-actin**: F-actin is a polymer, which means it is made up of smaller units called monomers. In the case of F-actin, these monomers are known as G-actin (globular actin). 3. **Formation of F-actin**: The process of forming F-actin begins with G-actin monomers. These G-actin monomers can polymerize to form dimers and trimers, which are small aggregates of two or three G-actin molecules. 4. **Polymerization**: As more G-actin monomers join these dimers and trimers, they continue to polymerize, leading to the formation of long filamentous structures known as F-actin. 5. **Function of F-actin**: F-actin is essential for muscle contraction and plays a role in various cellular processes, including motility and structural support. 6. **Conclusion**: Therefore, each F-actin of thin filaments is a polymer of G-actin monomers. **Final Answer**: Each 'F' actin of thin filaments is a polymer of G-actin. ---
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