Energy produced when ATP is converted to ADP and phosphate is stored in ___________.Multiple Choiceactin myofilamentstropomyosintroponinmyosin heads

The energy produced when ATP (adenosine triphosphate) is converted to ADP (adenosine diphosphate) and inorganic phosphate (Pi) is primarily stored in myosin heads.

Explanation:

During muscle contraction, ATP binds to myosin heads, providing the energy necessary for them to attach to actin filaments. Once the myosin heads are attached, ATP is hydrolyzed to ADP and Pi, releasing energy that enables the myosin heads to perform a power stroke, pulling the actin filaments and causing the muscle to contract. The myosin heads then release ADP and Pi, which is crucial for the continuation of the contraction cycle.

Options like actin myofilaments, tropomyosin, and troponin are structural or regulatory proteins, and while they play essential roles in muscle contraction, they do not store the energy from ATP hydrolysis. Thus, the correct answer is myosin heads.