Which of the following is true about antibiotics?

• A. Helminths
• B. Bacterial
• C. Prions
• D. All of the above

Answer: (B)

Antibiotics are drugs that kill or inhibit the growth of bacteria by targeting features unique to bacterial cells, such as their cell wall, ribosomes, or DNA replication processes. They do not act on helminths (parasitic worms) or prions (misfolded proteins). Helminths require antihelminthic medications that affect worm-specific biology, not antibiotics. Prions cause disease through protein misfolding and propagation, which antibiotics cannot fix. Because of that, the statement that applies to antibiotics is that they act on bacteria. An option claiming all of the above would be false since the other two organisms aren’t affected by antibiotics.