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Which of the following molecules is not a secondary messenger? cAMP PI glucagon DAG Calcium

Which of the following molecules is not a secondary messenger?
cAMP

PI

glucagon

DAG

Calcium
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Answer #1

Ans: Glucagon

This is because glucagon is a hormone that belongs to the secretin family, that is synthesized by the alpha cells of the Islets of Langerhans of the pancreas. The biochemical function of the glucagon is to convert the stored glycogen in the liver into glucose and acts contrary to the insulin i.e it increases the blood sugar level when the concentration of the same goes down. Other options are not applicable because cyclic AMP (cAMP), Diacylglycerol (DAG), PI and calcium are all examples of secondary messenger i.e they are involved in the process of signal relaying and transmission.

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