Consider this pathway: epinephrine → G protein-coupled receptor → G protein → adenylyl cyclase → cAMP. Identify the second messenger.
a. cAMP
b. G protein
c. GTP
d. adenylyl cyclase

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Riia

Answer:

a. cAMP

Explanation:

Secondary messengers are signaling molecules which are present intracellularly and play a great role in amplification of a signal during signal transduction pathway.

cAMP, DAG and IP3 are common secondary messengers in GPCR signalling. GPCR are largest family of cell surface receptors which are associated with various functions like control of blood vessel dialation, interstitial epithelial cells, glycogen breakdown, inflammation, photoisomerization reaction etc.

The second messenger in the pathway is cAMP.

The correct option is a.

What is cAMP pathway?

cAMP pathway also called as adenylyl cyclase pathway.

It is a G protein coupled receptor used in cell signalling process.

It comes under secondary messenger.

Likewise, it works by activating protein kinase A.

It is an important pathway for many living processes.

Thus, the correct option is a, cAMP.

Learn more about cAMP, here:

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