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.
Correct Answer:
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Q7: Which enzyme catalyzes the step in purine
Q8: The pyrimidine ring system is shown below.What
Q9: The pyrimidine ring system is shown below.What
Q10: A ribose sugar is added to _
Q11: _ is a precursor for the de
Q13: Which are purines?
A)Adenine and thymine.
B)Guanine and adenine.
C)Cytosine
Q14: The purine ring system is shown below.What
Q15: Which structure below is PRPP? 
Q16: Four of the ten enzymes required for
Q17: Which is a method by which the
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