Question

the thin filaments of the sarcomere are made up mostly of the protein ____________. multiple choice actin myosin myofibrils troponin

Explanation:

Sarcomere thin - filaments are mainly composed of actin. Myosin makes up thick - filaments. Myofibrils are composed of sarcomeres. Troponin is associated with thin - filaments but is not the main protein.

Answer:

A. actin