This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following is the function of Tropomyosin? 
Select and explain. 
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
D: It covers myosin and prevents attachments of actin and myosin
Answer: D: It covers myosin and prevents attachments of actin and myosin 
Explanation: 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