Microbiology: An Introduction
Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 11, Problem 9MCQ

When Legionella was newly discovered, why was it classified with the pseudomonads?

  1. a. It is a pathogen.
  2. b. It is an aerobic gram-negative rod.
  3. c. It is difficult to culture.
  4. d. It is found in water.
  5. e. none of the above
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How do Gram-negative bacteria differ from Gram-positivebacteria?a. They are not pathogenic.b. Their peptidoglycan cell wall is thinner.c. Gram-negative bacteria cannot be Gram stained.d. They possess a single plasma membrane.e. Gram-negative bacteria do not photosynthesize.
Which of the following antibiotics will be effective against Klebsiella sp. in vitro? A. Ampicillin: binds to penicillin-binding proteins B. Bacitracin: inhibits the formation of peptidoglycan of Gram positive bacteria C. Colistin: targets bacterial endotoxin D. Antibiotic X: 1400 Da antibiotic that inhibits cell wall synthesis
Bacillus subtilis and Bacillus cereus most likely showed greater resistance to UV light than Serratia marcescens. This is due to: a. Bacillus spp. are Gram-positive, while Serratia marcescens is Gram-negative b. the Bacillus spp. are spore fonners c. the pigment of Serratia marcescens absorbs more radiation than other cells d. Bacillus spp. have enzymes that protect them from ozone
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