Name a sulfa antibiotic.

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Multiple Choice

Name a sulfa antibiotic.

Explanation:
Sulfonamide antibiotics, or “sulfa” drugs, block a bacterium’s ability to synthesize folic acid, which is essential for growth. Bactrim is a combination of sulfamethoxazole (a sulfonamide) and trimethoprim, so it qualifies as a sulfa antibiotic. The other options are not sulfa drugs: amoxicillin and Augmentin are penicillins (beta-lactam antibiotics), and Keflex is a cephalexin (a cephalosporin, also a beta-lactam).

Sulfonamide antibiotics, or “sulfa” drugs, block a bacterium’s ability to synthesize folic acid, which is essential for growth. Bactrim is a combination of sulfamethoxazole (a sulfonamide) and trimethoprim, so it qualifies as a sulfa antibiotic. The other options are not sulfa drugs: amoxicillin and Augmentin are penicillins (beta-lactam antibiotics), and Keflex is a cephalexin (a cephalosporin, also a beta-lactam).

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