AP Biologymediummcq1 pt
A drug blocks adenylyl cyclase. Which signaling step is directly prevented?
A.cAMP production
B.Ligand–receptor binding
C.GTP hydrolysis
D.Phospholipid bilayer assembly
Explanation
Core Concept
Adenylyl cyclase converts ATP to cAMP in pathways that use cAMP as a second messenger. Blocking the enzyme directly prevents or strongly reduces cAMP production, thereby disrupting cAMP-dependent effectors such as protein kinase A. It does not imply that every possible downstream kinase pathway in the cell can never be activated by any other route.
Correct Answer
AcAMP production
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