8. Calmodulin is a(n): A) Allosteric activator of calcium-dependent enzymes B) A

Question

8. Calmodulin is a(n): A) Allosteric activator of calcium-dependent enzymes B) Allosteric inhibitor of calcium-dependent enzymes C) Calcium-dependent enzyme D) Cell surface calcium receptor E) Regulatory subunit of calcium-dependent enzymes 9. What is the correct order for the fo cascade? 1) MEK 2) ERK 3) Raf 4) RTK A) B) C) D) 4, 2, 3, 1 2, 1, 3, 4 4, 3, 1, 2 4, 1, 2, 3 10. Guanyl cyclase receptor enzymes: A) Catalyze the synthesis of a phosphate ester B) Are all membrane-spanning proteins C) Are examples of ligand-gated ion channels D) Catalyze synthesis of a phosphoric acid anhydride

Explanation / Answer

Ans 8 : E) Regulatory subunit of calcium - dependent enzymes

It is a calcium binding messenger protein which acts as a target of secondary messenger Ca2+ . It binds to variety of target proteins and hence acts as a regulatory subunit of calcium dependent enzymes.

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