Microbiology Chapter 11

1) Which of the following are found primarily in the intestines of humans? A) gram-positive cocci B) gram-negative aerobic rods and cocci C) facultatively anaerobic gram-negative rods D) aerobic, helical bacteria E) endospore-forming rods

2) What is group "c." in the key shown in Figure 11.1? A) bacteroidetes B) planctomycetes C) spirochaetes D) fusobacteria E) chlamydiae

3) Which of the following is NOT a characteristic inherent of the non-endospore-forming gram-positive rods? A) nonpathogenic B) lack cell walls C) carry out fermentative metabolism D) are aerotolerant E) display a branched filamentous morphology

4) Which of the following is NOT a characteristic of Neisseria? A) cocci B) gram-negative C) oxidase-positive D) requires X and V factors E) Some species are human pathogens

5) Staphylococcus and Streptococcus can be easily differentiated in a laboratory by which one of the following? A) ability to cause disease B) Gram stain reaction C) growth in high salt concentrations D) glucose fermentation E) cell shape

6) Which of the following genera is an anaerobic gram-negative rod? A) Treponema B) Bacteroides C) Staphylococcus D) Neisseria E) Escherichia

7) Which of the following do you expect to be MOST resistant to high temperatures? A) Neisseria gonorrhoeae B) Streptococcocus pyogenes C) Staphylococcus aureus D) Bacillus subtilis E) Eschericia coli

8) Which of the following is NOT an enteric? A) Escherichia B) Enterobacter C) Campylobacter D) Salmonella E) Shigella

9) Which of the following is NOT a characteristic of spirochetes? A) gram-negative B) found in the human oral cavity C) easily observed with brightfield microscopy D) possess an axial filament E) helical shape

10) You have isolated a bacterium that grows in a medium containing an organic substrate and nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. You can be sure that this bacterium is A) a photoautotroph. B) a chemoautotroph. C) using anaerobic respiration. D) a photoheterotroph. E) gram-positive

11) Which of the following lacks a cell wall? A) Clostridium B) Nocardia C) Borrelia D) Mycobacterium E) Mycoplasma

12) Which of the following bacteria is gram-negative? A) Bacillus B) Staphylococcus C) Treponema D) Corynebacterium E) Mycobacterium

13) Which of the following form conidiospores? A) rickettsias B) endospore-forming gram-positive rods and cocci C) anaerobic gram-negative cocci D) actinomycetes and related organisms E) spiral and curved bacteria

14) Which of the following pairs is mismatched? A) dissimilatory sulfate-reducing bacteria — produce H2S B) chemoautotrophic bacteria — fix atmospheric nitrogen C) Cytophaga — a gliding, nonfruiting bacterium D) actinomycetes — reproduce by fragmentation E) archaea — extremophiles

15) Rickettsias differ from chlamydias in that rickettsias A) are intracellular parasites. B) are gram-negative. C) are enterics. D) require an arthropod for transmission. E) form elementary bodies.

16) Requirements for X and V factors are used to identify A) Pseudomonas. B) Haemophilus. C) Staphylococcus. D) Escherichia. E) Neisseria

17) You have isolated a bacterium that grows in a medium containing only inorganic nutrients. Ammonia is oxidized to a nitrate ion. This bacterium is A) a photoautotroph B) a chemoautotroph. C) gram-negative. D) a photoheterotroph. E) using anaerobic respiration

18) Which of the following bacteria is gram-positive? A) Salmonella B) Rickettsia C) Pseudomonas D) Bacteroides E) Streptococcus

19) Escherichia coli belongs to the A) actinomycetes. B) green sulfur bacteria. C) spirochetes. D) proteobacteria. E) gram-positive bacteria

20) Which one of the following bacteria does NOT belong with the others? A) Lactobacillus B) Staphylococcus C) Bacillus D) Streptococcus E) Escherichia

21) Which of the following statements about the causative agent of Rocky Mountain spotted fever is FALSE? A) It is transmitted by ticks. B) It is an intracellular parasite. C) It is found in soil and water. D) It is in the genus Rickettsia. E) It is gram-negative.

22) A primary difference between cyanobacteria and purple and green phototrophic bacteria is A) color. B) cell type. C) electron donor for CO2 reduction. D) cell wall type. E) energy source

23) Which one of the following bacteria does NOT belong with the others? A) Salmonella B) Pseudomonas C) Burkholderia D) Campylobacter E) Bordetella

24) Which of the following bacteria are responsible for more infections and more different kinds of infections? A) Pseudomonas B) Neisseria C) Salmonella D) Streptococcus E) Staphylococcus

25) Both Beggiatoa and the purple sulfur bacteria use H2S. These bacteria differ in that Beggiatoa A) is a heterotroph. B) uses H2S for an energy source. C) uses H2S for a carbon source. D) belongs to the gammaproteobacteria. E) uses light energy

26) The nonsulfur photosynthetic bacteria use organic compounds as A) energy sources. B) electron acceptors. C) oxygen sources. D) electron donors to reduce CO2. E) carbon sources

27) Which of the following is the best reason to classify Streptococcus in the Lactobacillales? A) fermentation of lactose B) morphology C) Gram reaction D) found in dairy products E) rRNA sequences

28) Streptomyces differs from Actinomyces because Streptomyces A) produces conidia. B) is a bacterium. C) forms filaments. D) is a strict aerobe. E) makes antibiotics.

29) All of the following bacteria are gram-positive. Which does NOT belong with the others? A) Mycobacterium B) Bacillus C) Listeria D) Actinomyces E) Corynebacterium

30) Salmonella, Shigella, Yersinia, and Serratia are all A) gram-positive aerobic cocci. B) endospore-forming bacteria. C) gram-negative facultatively anaerobic rods. D) fermentative. E) pathogens

31) You have isolated a gram-positive rod. What should you do next? A) endospore stain B) enterotube C) lactose fermentation D) Gram stain E) flagella stain

32) Borrelia is classified as a spirochete because it A) is aerobic. B) is a pathogen. C) possesses an axial filament. D) is a rod. E) is transmitted by ticks

33) Thiobacillus oxidizes inorganic sulfur compounds and reduces CO2. This bacterium is a A) gammaproteobacteria. B) chemoheterotroph. C) chemoautotroph. D) photoautotroph. E) photoheterotroph

34) You have isolated a prokaryotic cell. The first step in identification is a(n) A) lactose fermentation test. B) endospore stain. C) Gram stain. D) flagella stain. E) DNA fingerprint

35) Actinomycetes differ from fungi in that actinomycetes A) cause disease. B) are decomposers. C) require light. D) lack a membrane-bounded nucleus. E) are chemoheterotrophs.

36) You have isolated an aerobic gram-positive, endospore-forming bacterium that grows well on nutrient agar. To which of the following groups does it most likely belong? A) gammaproteobacteria B) bacillales C) deltaproteobacteria D) phototrophic bacteria E) The answer cannot be determined based on the information provided

37) Which of the following pairs is mismatched? A) enterics — gram-negative B) mycobacteria — acid-fast C) Pseudomonas — gram-positive D) spirochete — axial filament E) aerobic, helical bacteria — gram-negative

38) Which one of the following does NOT belong with the others? A) Rickettsia B) Wolbachia C) Ehrlichia D) Coxiella E) Staphylococcus

39) Caulobacter are different from most bacteria in that they A) are gram-positive. B) lack cell walls. C) have stalks. D) are motile. E) are gram-negative

40) All of the following bacteria are motile. Which does NOT have flagella? A) Escherichia B) Pseudomonas C) helical bacteria D) Salmonella E) spirochetes

41) Which of the following bacteria does NOT belong with the others? A) Methanobacterium B) Halobacterium C) Halococcus D) Staphylococcus E) Sulfolobus

42) Mycoplasmas differ from other bacteria in that they A) are acid-fast. B) lack a cell wall. C) are motile. D) are gram-negative. E) grow inside host cells

43) Which of the following pairs is NOT correctly matched? A) endospore — Clostridium B) elementary body — Escherichia C) myxospore — gliding bacteria D) endospore — Bacillus E) heterocyst — cyanobacteria

44) Burkholderia was reclassified from the gammaproteobacteria to the betaproteobacteria because A) its rRNA sequence is similar to that of Neisseria. B) it is a gram-negative rod. C) it causes infections in cystic fibrosis patients. D) it grows in disinfectants. E) it causes melioidosis.

45) The crab industry needs female crabs for growing more crabs. What bacterium might be used to ensure development of female crabs and shrimp? A) Gemmata B) Pelagibacter C) Acinetobacter D) Wolbachia E) Neisseria