🎴 Flashcard Mode
Purine Metabolism: Exploring the Pathways for Synthesizing and Degrading Purines
Card1 / 15
Mastered0
Review0
QuestionClick to flip
Which enzyme catalyzes the rate-limiting step in de novo purine biosynthesis?
AnswerClick to flip back
A
Phosphoribosyl pyrophosphate amidotransferase (PPAT)
💡 Explanation:
PPAT catalyzes the first step in de novo purine biosynthesis, which is the conversion of phosphoribosyl pyrophosphate (PRPP) to 5-phosphoribosyl-1-amine (PRA).