Trimethoprim acts by:

A. Inhibiting peptidyl transferase enzyme

B. Inhibiting dihydrofolate reductase enzyme

C. Inhibiting Dihydropteroate synthase enzyme

D. Binds to 50s ribosomal unit and prevents protein synthesis

Correct Answer: Inhibiting dihydrofolate reductase enzyme

Description: Trimethoprim, Methotrexate and pyrimethamine inhibits dihydrofolate reductase enzyme and prevents formation of Tetrahydrofolic acid and from Dihydrofolic acid.

Category: Pharmacology

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