Asked by Taina Prince on Jun 11, 2024
Verified
Which of the following is NOT a property of the myosin head?
A) They form cross-bridges with the active sites of actin.
B) They have a hinge region to bend and straighten.
C) They bind to troponin.
D) They have ATPase activity.
E) They bind to ATP.
Myosin Head
The globular part of the myosin protein that binds to actin filaments in muscle cells during contraction.
Troponin
A protein complex involved in the regulation of skeletal and cardiac muscle contraction, which binds to calcium ions causing a change that allows muscle contraction.
ATPase Activity
The enzymatic activity involved in hydrolyzing ATP (adenosine triphosphate) to release energy.
- Unpack the process through which muscle contraction occurs and the roles played by vital proteins.
Verified Answer
DS
Deepali SinglaJun 16, 2024
Final Answer :
C
Explanation :
Myosin heads do not bind to troponin; instead, they bind to actin. Troponin is involved in the regulation of muscle contraction by controlling the exposure of binding sites on actin, but it is not a direct binding partner of myosin heads.
Learning Objectives
- Unpack the process through which muscle contraction occurs and the roles played by vital proteins.