Question

multiple choice question the myosin structure labeled a is a myosin head. cross - bridge. myosin tail.

Explanation:

Myosin is a motor protein. The head of myosin is the part that binds to actin filaments during muscle - contraction and forms cross - bridges. The structure labeled A is the myosin head. A cross - bridge is the connection formed between myosin head and actin, and the myosin tail is the long, fibrous part opposite the head.

Answer:

myosin head.