Which of the following is TRUE of myosin? 1) It is located in the A band of the sarcomere. 2) It binds to tropomyosin during contraction. 3) It forms thick filaments. 4) The molecules are helix shaped.
A) 1, 2, 3, 4 B) 1, 2, 3 only C) 1, 3 only D) 2, 4 only