Question

Active sites on actin are exposed immediately after
a. myosin binds to troponin
b. actin binds to troponin
c. calcium binds to troponin
d. calcium binds to tropomyosin
e. troponin binds to tropomyosin

Answer 1

Answer:

C. calcium binds to troponin

Explanation:

calcium needs to bind to troponin to cause the confirmational change in tropomyosin to expose the actin binding sites

Answer 2

Answer:

C is right

Explanation: