Which of the Following Is Correct Regarding the Biosynthesis of Purines

question 6

Multiple Choice

Which of the following is correct regarding the biosynthesis of purines and pyrimidines?

• A) 5-phosphoribosyl-1-pyrophosphate (PRPP) is a precursor to both purines and pyrimidines.
• B) The pyrimidine ring is synthesized first, and then linked to 5-phosphoribosyl-1-pyrophosphate.
• C) The purine ring is built around the C1 of 5-phosphoribosyl-1-pyrophosphate.
• D) All of the above.
• E) None of the above.

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