Chapter 11

24) Which of these organisms is gram+? A) Pseudomonas B) Salmonella C) Streptococcus D) Rickettsia

C) Streptococcus

5) Which of the following terms is the most specific? A) Bacillus B) anaerobic C) gram-positive D) bacillus E) endospore-forming rods & cocci

A) Bacillus

20) Which genus of bacteria is responsible for causing more infections in every area of the human body? A) Streptococcus B) Neisseria C) Staphylococcus D) Salmonella

A) Streptococcus

22) Which of the following is NOT gram-positive? A) Treponema B) Mycobacterium C) Bacillus D) Corynebacterium

A) Treponema

12) Cyanobacteria differ from purple and green phototrophic bacteria because cyanobacteria A) produce oxygen during photosynthesis. B) do not require light. C) use H2S as an electron donor. D) have a membrane-enclosed nucleus.

A) produce oxygen during photosynthesis.

9) The phylogenetic relationship in proteobacteria is based on ______studies A) rRNA B) mRNA C) DNA D) tRNA

A) rRNA

23) Bartonella henselae causes A) Ehrlichiosis B) Cat-scratch disease C) Rocky Mountain spotted fever D) Crown gall

B) Cat-scratch disease

16) Which of the following are commonly found in the intestines of humans? A) Gram-positive cocci B) Facultatively anaerobic gram-negative rods C) Aerobic helical bacteria D) Gram-negative aerobic rods & cocci

B) Facultatively anaerobic gram-negative rods

15) You have isolated a prokaryotic cell. The first step in identification is A) Lactose fermentation B) Gram stain C) Endospore stain D) Flagella stain

B) Gram stain

8) The genus Pseudomonas consists of organisms that are A) Aerobic B) Gram-negative rods C) Nonmotile D) Gram-positive cocci

B) Gram-negative rods

21) In a laboratory, Staphylococcus & Streptococcus are easily differentiated by their A) Gram stain reaction B) Growth in high salt concentrations C) Ability to cause disease D) Cell shape

B) Growth in high salt concentrations

2) Which of the following does not belong with the others? A) Enterobacteriales B) Lactobacillales C) Legionellales D) Pasteurellales E) Vibrionales

B) Lactobacillales

14) Streptococcus pyogenes belongs to the A) Proteobacteria B) Low G+C gram+ bacteria C) High G+C gram+ bacteria D) Spirochetes E) Non-Proteobacteria gram- bacteria

B) Low G+C gram+ bacteria

25) What should you do if you suspect a patient has tuberculosis? A) Check for motility B) Perform an acid-fast stain C) Perform a Gram stain D) Look at a wet mount

B) Perform an acid-fast stain

1) If you Gram-stained the bacteria that live in the human intestine, you would expect to find mostly A) gram-positive cocci. B) gram-negative rods. C) gram-positive, endospore-forming rods. D) gram-negative, nitrogen-fixing bacteria. E) all of the above

B) gram-negative rods.

10) When Legionella was newly discovered, it was classified with the pseudomonads because A) it is a pathogen. B) it is an aerobic gram-negative rod. C) it is difficult to culture. D) it is found in water. E) none of the above

B) it is an aerobic gram-negative rod.

18) Elementary bodies are found in A) E. coli B) Streptococcus C) Chlamydiae D) Staphylococcus

C) Chlamydiae

13) Which of the following is NOT a characteristic of spirochetes? A) Easily observed with brightfield microscopy B) Gram-negative C) Difficult to culture in vitro D) Helical shape

C) Difficult to culture in vitro

19) A primary difference between cyanobacteria and purple sulfur and purple nonsulfur phototrophic bacteria is A) Color B) Cell wall type C) Electron donor for carbon dioxide reduction D) Energy source

C) Electron donor for carbon dioxide reduction

4) Which of the following is an intracellular parasite? A) Mycobacterium B) Bacillus C) Rickettsia D) Streptococcus E) Staphylococcus

C) Rickettsia

17) Blue-green algae are now called A) Chlorobi B) Chloroflexi C) Campylobacter D) Cyanobacteria

D) Cyanobacteria

11) Which one of the following does not belong with the others? A) Enterococcus B) Lactobacillus C) Streptococcus D) Staphylococcus E) all are grouped together

D) Staphylococcu

7) Spirillum is not classified as a spirochete because spirochetes A) possess flagella B) do not cause disease C) are prokaryotes D) possess axial filaments E) none of the above

D) possess axial filaments

3) Pathogenic bacteria can be A) motile B) rods C) cocci D) anaerobic E) all of the above

E) all of the above

6) Which of the following pairs is mismatched? A) anaerobic endospore-forming gram+ rods— Clostridium B) facultatively anaerobic gram- rods— Escherichia C) facultatively anaerobic gram- rods— Shigella D) pleomorphic gram+ rods— Corynebacterium E) spirochete— Helicobacter

E) spirochete— Helicobacter