Question

what is the relevance of ADP and pi to the cycle of the myosin head .......

what is the relevance of ADP and pi to the cycle of the myosin head ....

explain in a paragraph
Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Answer: Myosin has a binding site for actin as well as for ATP. There is binding of ATP to myosin head and then the enzyme myosin ATPase breaks down ATP into ADP and inorganic phosphate. The energy released takes part in cross bridge formation. Whereas the ADP and iP remains attached and the myosin is in high energy state. After the power stroke, the ADP is released but the cross bridge remains at its place. Now again the ATP binds to myosin resulting in release of actin from the myosin head, thus freeing the active sites on the myosin head for the next cycle and hence causing relaxation.

Since ATP is needed for relaxation, therefore in the absence of ATP, the muscle remains in contacted state.

The relevance of ADP is that it helps the myosin to stay in high energy state.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The Myosin head pivots towards the M-line during the power stroke of muscle contraction immediately after:...
The Myosin head pivots towards the M-line during the power stroke of muscle contraction immediately after: ATP binds to the myosin head ADP and Pi fall of the head The myosin head hydrolyzes the ATP to ADP and Pi Calcium binds to troponin From Smallest to largest, which of the following is in the correct order: Myofilament, Myofibril, Myofiber Myofiber, Myofilament, Myofibril Myofiber, Myofibril, Myofilament Myofibril, Myofilament, Myofiber Which of the following is not a component of a thin filament?...
Which conformation of the lollipop head of ATP synthase is responsible for converting ADP and Pi...
Which conformation of the lollipop head of ATP synthase is responsible for converting ADP and Pi into ATP? A) Closed B) Tight C) Open D) Loose
Q1. As ATP binds to the myosin head, Select one: a) the myosin head detaches from...
Q1. As ATP binds to the myosin head, Select one: a) the myosin head detaches from actin b) the myosin molecule lengthens c) the myosin head attaches more tightly to actin d) the myosin molecule shortens e) the myosin head's actin binding site is physically blocked Q2. Which type of autonomic receptor is found on the adrenal medullary cells? Select one: a) alpha b) nicotinic c) beta-2 d) beta-1 e) muscarinic
Describe the ATPase cycle of myosin II.
Describe the ATPase cycle of myosin II.
If the synthesis of ATP from ADP and Pi is +30.5 kJ/mol, what is the minimum...
If the synthesis of ATP from ADP and Pi is +30.5 kJ/mol, what is the minimum amount of energy needed from a reaction to drive ATP synthesis??
1a) Explain what effect an accumulation of ADP has on the citric acid cycle? How is...
1a) Explain what effect an accumulation of ADP has on the citric acid cycle? How is this linked to the oxidative phosphorylation pathway? b) Explain the effect of excess NADH on the CAC and how this is linked to the oxidative phosphorylation pathway? 2) Although oxygen does not participate directly in the citric acid cycle, the cycle operates only when oxygen is present. Is this also true with beta-oxidation? With glycolysis? Explain each of your answers.
What biochemical process must occur in the myosin head to initiate the "power stroke" in muscle...
What biochemical process must occur in the myosin head to initiate the "power stroke" in muscle contraction, which is characterized by a large protein conformational change? What conformational change is associated with ATP hydrolysis?
You have a patient who has a very strange disorder. In this disorder, ADP sticks permanently...
You have a patient who has a very strange disorder. In this disorder, ADP sticks permanently to the myosin head. From your knowledge of excitation contraction coupling, describe how this patient will present. Defend your position.
How many ATP equivalents (ATP -> ADP + Pi) are needed to make a 200 amino...
How many ATP equivalents (ATP -> ADP + Pi) are needed to make a 200 amino acid polypeptide from a mRNA template, amino acids and tRNA molecules. GTP -> GDP + Pi counts as one ATP equivalent and ATP -> AMP + 2 Pi counts as 2 equivalents.
You have a patient who has a very strange disorder. In this disorder, ADP sticks permanently...
You have a patient who has a very strange disorder. In this disorder, ADP sticks permanently to the myosin head. From your knowledge of excitation contraction coupling, describe how this patient will present. Defend your position. Please be clear, thank you!
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT