Which of the following is NOT classified as an antibiotic?

Prepare for the Public Health Sanitarian Test with flashcards and multiple choice questions. Each question offers hints and explanations. Get ready to ace your exam!

Trypsin is classified as a proteolytic enzyme rather than an antibiotic. Antibiotics are substances that target bacteria, either killing them or inhibiting their growth, and they are primarily used to treat bacterial infections.

In contrast, trypsin's role is to break down proteins in the digestive system; it does not have antibacterial properties or functions. This distinct functionality is what categorizes it differently from the other substances listed. Penicillin, amoxicillin, and ciprofloxacin are all antibiotics that are used to fight bacterial infections, each with different mechanisms of action and spectrums of activity against various bacteria.

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