Sulfa Drugs Like Bactrim, Given for Bacterial Infections, Inhibit Bacteria

question 2

Multiple Choice

Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking folic acid synthesis. The precursor molecule of folic acid is para-amino benzoic acid (PABA) . Interestingly, PABA has a structure very similar to a sulfa drug. If a sulfa drug is present, the bacterial enzyme will
Bind the sulfa drug because of structural similarity. This is an example of ______.

• A) enzyme induction
• B) enzyme repression
• C) noncompetitive inhibition
• D) competitive inhibition
• E) catabolite repression

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