Each Myosin Head Has a Binding Site For

Question

Each myosin head has a binding site for
A) calcium only.
B) actin only.
C) ATP only.
D) calcium and ATP.
E) actin and ATP.

Accepted Answer

Myosin heads have binding sites for both actin and ATP. This allows them to bind to actin filaments and use the energy from ATP hydrolysis to generate force and move the filaments, which is essential for muscle contraction and other cellular processes. Calcium ions also play a role in muscle contraction but do not directly bind to the myosin head.