5. Which of the following happens when the myosin head\' extends A. ATP binds to

Question

5. Which of the following happens when the myosin head' extends A. ATP binds to myosin B. ATP binds to F-factin ADP dissociate from myosin D. C. ATP is hydrolyzed E. A phosphate ion dissociate from myosin 6. The word 'epitope' means synonyms to isotope 8. A. a binding site on an antibody to a specific antigen a binding site on an antigen to a specific antibody D. C. a domain of an antibody E. a protein motif of an antigen 7. What is the fraction of occupied binding sites of a protein of a single binding site in a mixture with its ligand, and the free ligand concentration in the mixture is be 3 times of it Kd (1u] -3 Kd) (kd is the dissociation constant of the protein-ligand complex)? A. 0.25 8. 4.0 C 0.33 D. 0.20 E. None of the above measured to Which of the following amido N-H forms hydrogen bonding to the carbonyl indicated in a-helix of a protein secondary structure 8. A) B) C) D) E)

Explanation / Answer

Ans 5 : D) ATP is hydrolysed

When the myosin head is extended , it utilises the energy released from the calcium driven hydrolysis of ATP. This head then binds to the filamentous actin , generating the force and push the actin over the surface.

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