Question: deoxyribonucleotides are formed from 5-phosphodeoxyribosyl 1-pyrophosphate?
Answer: Deoxyribonucleotides are formed from 5-phosphodeoxyribosyl 1-pyrophosphate. Inosinate is the purine nucleotide that is the precursor of both adenylate and guanylate. Orotic acid is an essential precursor for purine nucleotides. The amino acid valine is one of the precursors contributing to purine nucleotides.