The ribosyl phosphate moiety needed for the synthesis of orotidylate,inosinate,and guanylate is provided most directly by:

Question

Quizplus · Accepted Answer

5-phosphoribosyl 1-pyrophosphate (PRPP) is a key precursor for the biosynthesis of nucleotides. It provides the ribosyl phosphate moiety for the synthesis of orotidylate (required for the de novo synthesis of pyrimidine nucleotides), inosinate (required for the de novo synthesis of purine nucleotides), and guanylate (required for both the de novo and salvage pathways of purine nucleotide synthesis). Therefore, option A is the best choice as it directly provides the ribosyl phosphate moiety needed for these nucleotide syntheses.

The Ribosyl Phosphate Moiety Needed for the Synthesis of Orotidylate,inosinate,and