Microbiology

Microbiology Study Guide

99. Which of the following is not a characteristic of the plasma membrane? a. It is selectively permeable b. It contains proteins c. It maintains the cell’s shape d. It is composed of a phospholipid bilayer 100. The number of red blood cells can be determined from a differential count. a. True b. False 101. Which of the following would be selective against the tubercle bacillus and why? a. Ethambutol, because it inhibits the incorporation of mycolic acid into the cell wall b. Vancomycin, because it inhibits peptidoglycan synthesis c. Bacitracin, because it inhibits peptidoglycan synthesis d. Streptomycin, because it inhibits protein synthesis 102. Why do bacterial cells die in the presence of penicillin? a. Because bacterial cells lack a cell membrane b. Because bacterial cells lack a cell wall c. Because bacterial cells plasmolyze d. Because bacterial cells undergo osmotic lysis 103. __________________ is described by the following process: NH3 à NO2- à NO3-

a. Nitrogen fixation b. Nitrification c. Denitrification d. Ammonification

104. Choose the mismatched pair. a. Bordetella; gram-negative pleomorphic rod b. Corynebacterium; gram-positive rod c. Mycoplasma; gram-positive pleomorphic rod d. Mycobacterium; acid-fast rod 105. Type IV hypersensitivies can be passively transferred with serum. a. True b. False

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