Which of the Following Is the Mechanism of Action of 5-Fluorouracil

question 19

Multiple Choice

Which of the following is the mechanism of action of 5-fluorouracil?

• A)competitive inhibitor of dihydrofolate reductase
• B)competitive inhibitor of ribonucleotide reductase
• C)suicide substrate for thymidylate synthase
• D)non-competitive inhibitor of thioredoxin reductase

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