Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of

Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of



A. GTP.
B. phosphorylated proteins.
C. cAMP.
D. adenylyl cyclase.
E. activated G proteins.


Answer: C