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1. which is the cellular second messenger generated in esponse to serotonin? a. Cyclic Amp (cAMP)...

1. which is the cellular second messenger generated in esponse to serotonin?

a. Cyclic Amp (cAMP)

b. nitric oxide (NO)

c. IP3

d. Grb2

2. which is synthesized by the mmbrane-bond ribosomes of the RER?

a. peripheral membrane proteins

b. enzymes required by glycolysis

c. pex 5 receptor

d. enzymes o the inner mitochondrial-membrane

e. none.

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Answer #1

ANSWER (1) : a. Cyclic Amp (cAMP)

The serotonin hormone on binding to cell membrane, activates an intracellular component called the G - protein. This activated G-protein activates the enzyme adenyl cyclase, which converts adenosine triphosphate(ATP) to cyclic AMP (cAMP). This in turn activates protein kinase enzyme which initiates a cascade of phosphorylation reactions.

ANSWER (2) : a. peripheral membrane proteins

Rough endoplasmic reticulum (RER) are membrane-bound organelle present in eukaryotes .Its main function is to help in making proteins.RER works with another cell part called the ribosome and connects with the nuclear membrane to make proteins. produces glycoprotein necessary for structural integrity of cell membrane.

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