You may choose more than one answer. Which of the following is a mechanism of signal...

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Biology

You may choose more than one answer. Which of the following is amechanism of signal amplification in the cAMP-PKA pathway?
One signal molecule, epinephrine, activates lots ofG-proteins.
When activated, adenylyl cyclase synthesizes many cAMPmolecules.
cAMP-activated protein kinase A (PKA) can activate a number oftarget proteins by phosphorylation.
Proteins phosphorylated by PKA can further activate otherproteins that make other products

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Your answers are 1When activated adenylyl cyclase synthesizes many cAMP molecules 2 cAMPactivated protein kinase A PKA can activate a number of target proteins by phosphorylation EXPLANATION As long as epinephrine remains bound to a receptor the receptor can activate a succession of G proteins In addition each adenylyl cyclase enzyme can convert numerous ATPs into cyclic AMP molecules Other activated enzymes in the pathway can also continually catalyze reactions The G protein See Answer

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