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The First Step in the De Novo Biosynthesis of IMP

Question 65

Multiple Choice

The first step in the de novo biosynthesis of IMP is a reaction between glutamine and PRPP.Which statement is not true about this reaction?


A) An amine group is attached to the anomeric carbon atom of the ribose ring.
B) The configuration of the anomeric carbon atom is inverted from β to α.
C) A pyrophosphate is lost from PRPP.
D) The reaction is catalyzed by glutamine-PRPP aminotransferase.

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