Microbiology

Microbiology Study Guide

92. __________________ recurs at the initial site of infection. a. Syphilis b. Genital herpes c. Nongonococcal urethritis d. Gonorrhea 93. When does drug resistance occur? a. When antibiotics are used indiscriminately b. When antibiotics are taken after the symptoms disappear c. When antibiotics are taken after their expiration date d. None of the above 94. What is the purpose of a mordant in the gram stain? a. To make the flagella visible b. To remove the counterstain c. To make the bacterial cell larger d. To prevent the crystal violet from leaving the cell 95. An antibody is __________________. a. An immunoglobulin b. A protein made in response to an antigen that can combine with that antigen c. A protein that inactivates or kills an antigen d. B and C only 96. More than half of antibiotics are synthesized in laboratories. a. True b. False 97. What happens to pyruvic acid in an organism that uses aerobic respiration? a. It is oxidized in the electron transport chain b. It is reduced to lactic acid c. It is reduced during the Krebs Cycle d. It is oxidized during the Krebs Cycle 98. In salmonellosis, microorganisms become invasive. a. True b. False

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