Sulfa drugs bind to the active site of the enzyme which normally converts para-amino benzoic acid (PABA)to folic acid,preventing the production of folic acid and,eventually purine synthesis.In this case,the sulfa drug is acting as a/an:
A)allosteric inhibitor
B)competitive inhibitor
C)noncompetitive inhibitor
D)uncompetitive inhibitor

Question

Quizplus · Accepted Answer

Sulfa drugs bind to the active site of the enzyme, blocking the substrate (PABA) from binding and preventing the enzyme from carrying out its normal function. This is characteristic of a competitive inhibitor, as it competes with the substrate for the active site of the enzyme.

Sulfa Drugs Bind to the Active Site of the Enzyme