Question

The concentration of activated GP ends of being ________ times the concentration of epinephrine that initiates the signal transduction process.

a) 10
b) 100
c) 1000
d) 10,000

Answer 1

The concentration of activated G-protein (GP) ends up being 1000 times the concentration of epinephrine that initiates the signal transduction process.

Step-by-step explanation:

The concentration of activated G-protein (GP) ends up being 1000 times the concentration of epinephrine that initiates the signal transduction process.

The signal transduction process involving epinephrine and G-protein starts with epinephrine binding to a beta-adrenergic receptor on the plasma membrane of cells. This activates a G-protein, which then activates adenylyl cyclase. Adenylyl cyclase converts ATP to cyclic AMP (CAMP), which acts as a second messenger. The G-protein signals and GTPase activity cause the G-protein to release GDP and bind GTP, allowing it to activate adenylyl cyclase and initiate the production of CAMP.