In the cross-bridge cycle,the power stroke of myosin is immediately preceded by which of the following events?
A)the hydrolysis of ATP
B)binding the actin
C)releasing Pᵢ
D)binding new ATP

Question

Quizplus · Accepted Answer

The release of inorganic phosphate (Pᵢ) from the myosin head is the immediate event preceding the power stroke, which is the actual movement of the myosin head towards the center of the sarcomere, resulting in muscle contraction. The hydrolysis of ATP and the binding of new ATP occur earlier in the cycle, while the binding of actin occurs during the power stroke itself.

In the Cross-Bridge Cycle,the Power Stroke of Myosin Is Immediately