Fluorouracil inhibits DNA synthesis by decreasing the cell's supply of dTMP through which of the following actions?
A) activation of uracil phosphoribosyltransferase
B) inhibition of thymidylate synthase
C) inhibition of ribonucleotide reductase
D) inhibition of thymidine kinase
E) activation of uridine phosphorylase
Correct Answer:
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