The Phosphorylation of Proteins by ATP

question 1

Multiple Choice

The phosphorylation of proteins by ATP

• A) is catalyzed by enzymes known as "protein kinases."
• B) always stimulates the activity of an enzyme.
• C) is catalyzed by adenyl cyclase.
• D) always takes place in the cytoplasm.
• E) is catalyzed by G proteins.

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