Order the events listed such that they properly and sequentially detail the even
ID: 57439 • Letter: O
Question
Order the events listed such that they properly and sequentially detail the events of crossbridge formation and cycling as they occur following the binding of a molecule of ATP to the myosin head groups' ATP-binding sites.
Question 8 options:
123456
The activated myosin head groups contact and bind to actin binding sites exposed by the process of excitation-coupling that occurs in activated skeletal muscle cells, forming crossbridges that link the thick and thin filaments together.
123456
The bending of the myosin head groups toward the centers of the sarcomeres pulls or 'ratchets' the thin filaments along the thick filaments in the same direction, shortening the sarcomeres from both ends.
123456
The empty ATP-binding sites of the myosin head groups bind new molecules of ATP, which weakens and breaks the crossbridge connections, allowing the thick and thin filaments to dissociate from one another, ending one cycle of crossbridge formation. The next cycle begins with the hydrolysis of these newly-bound molecules of ATP.
123456
The inorganic phosphates (i.e. the Pi subunits) dissociate and leave the myosin head groups, which causes the crossbridge connections to tighten.
123456
The ADP subunits dissociate from the myosin head groups, leaving the ATP-binding sites empty and inducing shape changes in the myosin molecules that bend the heads toward the centers of the sarcomeres.
123456
The myosin head groups' ATPase enzyme activities hydrolyze the bound ATP molecules to ADP + Pi subunits; the energy released from the splitting of the high energy phosphate bonds is used to 'cock' the myosin head groups into their 'activated' positions.
123456
The activated myosin head groups contact and bind to actin binding sites exposed by the process of excitation-coupling that occurs in activated skeletal muscle cells, forming crossbridges that link the thick and thin filaments together.
123456
The bending of the myosin head groups toward the centers of the sarcomeres pulls or 'ratchets' the thin filaments along the thick filaments in the same direction, shortening the sarcomeres from both ends.
123456
The empty ATP-binding sites of the myosin head groups bind new molecules of ATP, which weakens and breaks the crossbridge connections, allowing the thick and thin filaments to dissociate from one another, ending one cycle of crossbridge formation. The next cycle begins with the hydrolysis of these newly-bound molecules of ATP.
123456
The inorganic phosphates (i.e. the Pi subunits) dissociate and leave the myosin head groups, which causes the crossbridge connections to tighten.
123456
The ADP subunits dissociate from the myosin head groups, leaving the ATP-binding sites empty and inducing shape changes in the myosin molecules that bend the heads toward the centers of the sarcomeres.
123456
The myosin head groups' ATPase enzyme activities hydrolyze the bound ATP molecules to ADP + Pi subunits; the energy released from the splitting of the high energy phosphate bonds is used to 'cock' the myosin head groups into their 'activated' positions.
Explanation / Answer
Answer:
cyclic sequence- 614523
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