Which of the Following Statements Is TRUE

Multiple Choice

Which of the following statements is TRUE?

A) PRPP is an effective feedback inhibitor of nucleotide synthesis.
B) GTP serves as the energy input for AMP synthesis from IMP.
C) Oxidation of ribosyl moieties to produce deoxynucleotides occurs at the diphosphate level.
D) Thymidylate synthase methylates dUTP to produce dTTP.
E) All of the above are true.