Microbiology

Microbiology Study Guide

124. __________________ is not a chemical component of bacterial cell walls. a. N-acetylmuramic acid b. Peptidoglycan c. Cellulose d. Teichoic acids 125. All of the following produce an exotoxin except: a. Mycobacterium tuberculosis b. Bordetella pertussis c. Streptococcus pyogenes d. Corynebacterium diphtheria 126. An increased adherence of phagocytes to microorganisms is an effect of opsonization. a. True b. False 127. The presence of __________________ indicates a current infection rather than a previous infection or vaccination. a. 128. What is the major difference between viruses and bacteria? a. Viruses are filterable b. Viruses are obligate intracellular parasites c. Viruses do not have any nucleic acids d. Viruses are not composed of cells 129. Why do lysogenic bacteriophages (along with other bacteriophages) contribute to bacterial virulence? a. Because bacteriophages carry plasmids b. Because bacteriophages produce toxins c. Because bacteriophages give new gene sequences to host bacteria d. Because bacteriophages kill the bacteria, causing the release of endotoxins IgE b. IgM c. IgA d. IgG

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