A) ATP
B) C-AMP
C) ADP
D) NAD
Correct Answer: B
Solution :
Cyclic-AMP acts as second messenger for a number of regulatory molecules. Binding of the hormone in signal transduction with the receptor allpws coupling of the receptor to a G protein. If the G protein stimulates the adenylyl cyclase-c-AMP system, it is called \[{{G}_{s}}\]protein denoting a stimulatory G protein. Stimulation of adenylyl cyclase a membrane bound enzyme by the \[{{G}_{s}}\]protein than catalyse the conversion of a small amount of cytoplasmic ATP into cyclic-AMP inside the cell. This then activates c-AMP dependent protein kinase which phosphorylates specific proteins in the j cell triggering biochemical reactions that ultimately lead to the cells responses to the hormone.
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