Question
Biology Question on locomotion and movement
The globular head of myosin contains _____
A
Troponin
B
ATP
C
Calcium ions in large quantities
D
ATPase enzyme
Answer
ATPase enzyme
Explanation
Solution
Myosin is a muscle protein, which contributes 55% of muscle proteins by weight. It is composed of six polypeptide chains, two identical heavy chains and four identical light chains. One end of each heavy chain forms a globular mass that interacts with light chains called head. The head of each myosin consists of an ATPase enzyme, which releases energy in the head by breaking down ATP into ADP and Pi.