PHYSIOLOGY
MUSCLE CONTRACTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
In the breakdown of the ATP to ADP in the myosin head
|
|
energy is provided
|
|
|
one phosphate group is lost from ATP
|
|
|
ATPase acts as a catalist
|
|
|
all are true
|
Explanation:
Detailed explanation-1: -ATP first binds to myosin, moving it to a high-energy state. The ATP is hydrolyzed into ADP and inorganic phosphate (Pi) by the enzyme ATPase. The energy released during ATP hydrolysis changes the angle of the myosin head into a “cocked” position, ready to bind to actin if the sites are available.
Detailed explanation-2: -The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head.
Detailed explanation-3: -Which of the following statements about the “heads” of the myosin molecules is true? They form permanent links with actin filaments.
There is 1 question to complete.