Which Best Describes the Synthesis of Purine Nucleotides

question 40

Multiple Choice

Which best describes the synthesis of purine nucleotides?

• A)The basic ring structure,orotate,is synthesized and then linked to PRPP.This is then modified to produce either GMP or AMP.
• B)The basic ring structure,inosine,is synthesized and then linked to PRPP.This is then modified to produce either GMP or AMP.
• C)The basic ring structure,orotate,is synthesized stepwise on PRPP.This is then modified to produce either GMP or AMP.
• D)The basic ring structure,inosine,is synthesized stepwise on PRPP.This is then modified to produce either GMP or AMP.
• E)The basic ring structure,orotate,is synthesized and then linked to PRPP.This is then modified to produce either UMP or CMP.

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