TEST BANK FOR MEDICAL MICROBIOLOGY, 6TH EDITION BY PATRICK R. MURRAY

Murray: Medical Microbiology, 6th Edition Chapter 02: Bacterial Classification, Structure, and Replication Test Bank MULTIPLE CHOICE 1. Teichoic acids, mycolic acids, peptidoglycan, and disaccharide-pentapeptide subunits are all building blocks of which bacterial structure? a. Outer cell membrane b. Flagella c. Inner cell membrane d. Cell wall ANS: D 2. What is the major difference between the cell walls of gram-positive and gram-negative bacteria? a. The peptidoglycan layer in gram-positive bacteria is substantially thicker. b. The cell wall of gram-positive bacteria contains mycolic acids. c. Gram-positive bacteria contain a cytoplasmic membrane. d. Gram-positive bacteria may have a polysaccharide capsule as a covering. e. Gram-negative bacterial membranes contain ergosterol ANS: A 3. Which of the following distinguishes a bacterium from a eukaryote? a. Translation of the mRNA by the ribosome b. Phospholipid bilayer structure of the membranes c. ATP production from membrane potential at plasma membrane d. Semiconservative replication of chromosome e. Sensitivity to folate analogue antimetabolites ANS: C 4. Which reason explains why gram-positive bacteria are stain positive? a. Bacteria reduce the stain to produce the characteristic color. b. Cell wall traps the stain. c. Acetone treatment precipitates intracellular stain. d. Heat fixing uncovers stainable proteins. e. Outer membrane absorbs the stain.