Biology Question on locomotion and movement

Question

ATPase of the muscle is located in

Answer 1

Solution

The head of each myosin molecule contains an enzyme myosin ATPase. In the presence of myosin ATPase, $Ca^{2+}$ and $Mg^{2+}$ ions, ATP breaks down into ADP and inorganic phosphate, releasing energy in the head. $ATP {->[\text{Myosin AT pase}][Ca^{2+}, Mg^{2+}]} ADP + Pi +$ Energy