Purine Metabolism: Exploring the Pathways for Synthesizing and Degrading Purines

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Question 1 of 15

Which enzyme catalyzes the rate-limiting step in de novo purine biosynthesis?

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Phosphoribosyl pyrophosphate amidotransferase (PPAT)

Glutamine phosphoribosyl pyrophosphate amidotransferase (GPAT)

Inosine monophosphate dehydrogenase (IMPDH)

Hypoxanthine-guanine phosphoribosyltransferase (HGPRT)

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