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redheadprincess redheadprincess
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6 years ago
Adenylyl cyclase catalyzes the synthesis of cAMP, and cAMP hydrolysis is catalyzed by a 5'-phosphodiesterase. If caffeine inhibits 5'-phosphodiesterases, drinking a caffeinated beverage would ____ cAMP levels and ____ glycogen phosphorylase activity.
 
  a. increase; decrease
  b. increase; increase
  c. decrease; decrease
  d. decrease; increase
  e. have no effect; have no effect
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6 years ago
ANSWER: b
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