Binding sites on the surface of actin allow the formation of cross bridges with molecules of
A) ATP.
B) myosin.
C) troponin.
D) tropomyosin.
E) creatine.

Question

Quizplus · Accepted Answer

Binding sites on the surface of actin allow for the formation of cross bridges with molecules of myosin. These cross bridges are critical for muscle contraction. ATP is used to provide energy for the contraction process, but it does not directly bind to actin. Troponin and tropomyosin are regulatory proteins that control access to the binding sites on actin. Creatine is a molecule involved in providing energy for muscle contractions, but it does not interact with actin.

Binding Sites on the Surface of Actin Allow the Formation