Question: Substances that are naturally produced by certain microorganisms that can inhibit or destroy bacteria are called

Answer: A. antibiotics.

Question: Antimicrobials effective against a wide variety of microbial types are termed

Answer: E. broad-spectrum drugs

Question: Antibiotics are derived from all of the following except

Answer: C. Staphylococcus.

Question: An ideal antimicrobial therapeutic drug exhibits all of the following characteristics except

Answer: B. easily broken down by host.

Question: The use of a drug to prevent imminent infection is called

Answer: D. prophylaxis.

Question: Penicillins and cephalosporins

Answer: E. block peptidases that cross-link glycan molecules.

Question: Selective toxicity refers to damage to

Answer: C. the target organisms but not vertebrate cells.

Question: Each of the following affect cell walls except

Answer: D. erythromycin.

Question: .Aminoglycosides

Answer: C. attach to the 30S ribosomal subunit and disrupt protein synthesis

Question: Each of the following target prokaryotic ribosomes except

Answer: C. polymyxins.