Serena and Phil have both been diagnosed with bacterial infections. They each will start antibiotics that kill foreign bacteria. Serena takes one that inhibits protein synthesis while Phil takes one that inhibits bacterial cell wall synthesis. Which two antibiotics are they most likely starting?

Tetracyclines inhibit bacterial protein synthesis by acting on bacterial ribosomes. Penicillin inhibits bacterial cell wall synthesis, weakening the wall so the bacteria can be destroyed. Therefore, Serena is most likely taking tetracycline and Phil penicillin, which is choice B.

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