Answer:
D. all of these answers are correct
Explanation:
Actin binding proteins are responsible for the regulation of cytoskeletal microfilaments.
Actin binding proteins have the function to
1. Maintain the population of actin monomers,
2. regulate the polymerization of filaments
3. bind to and block the growing ends of actin filaments
4. assembly actin
5. bind to the sides of actin filaments
7. cross-link actin filaments
