A) extrinsic protein
B) intrinsic protein
C) G-protein
D) trimeric protein
Correct Answer: A
Solution :
Extrinsic proteins are insulin receptors. There are complex of two \[\alpha \] and two \[\text{ }\!\!\beta\!\!\text{ }\]-subunits held together by disulphide bonds. The polypeptide hormone insulin binds to the extracellular face of the \[\alpha \]-subumts.
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