Which of the following proteins found in myofilaments contains the cross-bridges?
A) Myosin
B) Actin
C) Tropomyosin
D) Troponin

Question

Quizplus · Accepted Answer

Myosin is the protein that contains the cross-bridges in myofilaments. These cross-bridges interact with actin filaments during muscle contraction, pulling them closer together and shortening the sarcomere. Tropomyosin and troponin are regulatory proteins that help regulate the interaction between myosin and actin.

Which of the Following Proteins Found in Myofilaments Contains the Cross-Bridges