OpenStax Microbiology Test Bank Chapter 4: Prokaryotic Diversity

OpenStax Microbiology Test Bank Chapter 4: Prokaryotic Diversity * = Correct answer Multiple Choice 1. Which is the best example of a population? A. all the microbes living in a particular area B. all the microbes of a particular domain living in a particular area C. all the microbes of a single species living in a particular area* D. all the microbes living within the same host 2. Microbial ecology is defined as the study of which of the following? A. competitive interactions between microbes B. cooperative interactions between microbes C. interactions between individuals of a single species D. interactions between microbial populations and their environment* 3. Which term best describes the relationship between pathogenic bacteria and humans? A. amensalism B. commensalism C. parasitism* D. predation 4. Which of the following is not a class within the phylum Proteobacteria? A. Alphaproteobacteria B. Betaproteobacteria C. Deltaproteobacteria D. Omegaproteobacteria* 5. Which of the following correctly characterizes Epsilonproteobacteria? A. They are atypical (not gram positive or gram negative). B. They are gram negative.* C. They are gram positive. D. They are gram variable. 6. Which describes bacteria that require low concentrations of oxygen to survive (less than that in the current atmosphere)? A. facultative anaerobes B. microaerophiles* C. obligate aerobes D. obligate anaerobes 7. Cyanobacteria produce which of the following? A. hydrogen sulfide gas B. large quantities of ammonia C. oxygen* D. sulfuric acid 8. Which of the following bacterial groups is thought to be most closely related to the last universal common ancestor? A. Alphaproteobacteria B. cyanobacteria C. deeply branching bacteria* D. green filamentous bacteria 9. Which of the following is a phylum in Domain Archaea? A. Crenarchaeotae* B. Deinococcus C. Mycoplasma D. Thermotogae 10. Which genus contains the nitrogen-fixing bacteria that live in legume nodules? A. Bacillus B. Escherichia C. Rhizobium* D. Vibrio 11. Approximately what percentage of prokaryotes are thought to be pathogens? A. <1%* B. 12% C. 26% D. 48% 12. Two species of bacteria live in near each other and use similar food resources. Which type of biological interaction does this describe? A. a competitive interaction* B. a cooperative interaction C. a mutualistic interaction D. a parasitic interaction 13. Which of the following is a source of vitamin K for humans? A. Bacteroides thetaiotetraiotamicron digests foods, which release vitamin K. B. Escherichia coli in their digestive tract produces vitamin K.* C. S. epidermidis releases vitamin K from dead cells. D. their diet only 14. The human microbiome consists of which of the following? A. all microbes present on or in the body* B. pathogenic microbes only C. resident microbes only D. transient microbes only 15. The most common bacterial genus found in plaque on teeth is which of the following? A. Fusobacterium* B. Haemophilus C. Lactobacillus D. Streptococcus 16. Who authored A Manual in Determinative Bacteriology, published in 1923? A. David Bergey* B. Robert Koch C. Barry Marshall and Robin Warren D. Louis Pasteur 17. Which of the following cannot be classified as either gram positive or gram negative on the basis of the Gram staining protocol? A. Bacillus B. Escherichia C. Mycoplasma* D. Vibrio 18. Bordetella pertussis is an example of which group of organisms? A. Cytophaga-Flavobacterium-Bacteroides B. high G+C bacteria C. Proteobacteria* D. spirochetes 19. Treponema pallidum, the causative agent of syphilis, is an example of which group of organisms? A. CFB group B. planctomycetes C. proteobacteria D. spirochetes* 20. Which of the following correctly describes the microscopic morphology of Bacteroides? A. gram-negative bacilli* B. gram-negative cocci C. gram-positive bacilli D. gram-positive cocci 21. Which best describes the metabolic activities of purple sulfur bacteria? A. They are capable of nitrogen fixation, fixing nitrogen gas into nitrates and ammonia. B. They are heterotrophic and break down organic compounds to obtain energy. C. They use light energy to oxidize hydrogen sulfide, producing sulfur and sulfuric acid.* D. They use light energy to oxidize organic compounds such as sugars. 22. How do Archaea differ from Bacteria? A. Archaea are found exclusively in extreme habitats. B. Archaea have ether linkages in their cell membranes.* C. Archaea have peptidoglycan cell walls. D. Archaea lack a nucleus. 23. Which of the following correctly describes the metabolism of methanogens? A. They oxidize CO2. B. They oxidize H2S. C. They produce CH4.* D. They produce N2 gas. 24. Which best describes Halobacterium salinarum? A. It is a type of methanogen. B. It is abundant in temperate environments. C. It is an example of the deeply branching bacteria. D. It is one of the oldest archaea.* 25. Which of the following is the correct classification for the methanogens? A. Archaea* B. low G+C bacteria