Which of the following is the function of Tropomyosin?: (A) It slides over myosin, (B) It causes release of calcium, (C) It helps in the fusion of actin and myosin, (D) It covers myosin and prevents attachments of actin and myosin
Answer is D. Tropomyosin molecules lie on top of the active sites of the actin strands, thereby preventing the attraction between the actin and myosin filaments. Ref: Ganong's Review of Medical Physiology, 23rd Edition, Chapter 5