Objective Questions

1)

Which of the following are found primarily in the intestines of humans? A)

Gram-negative aerobic rods and cocci B)

Aerobic, helical bacteria C)

Facultatively anaerobic gram-negative rods D)

Gram-positive cocci E)

None of the above

2)

Which of the following is a characteristic of Clostridium? A)

Endospore-forming cocci B)

Mycobacteria C)

Gram-negative aerobic cocci D)

Anaerobic gram-negative rods E)

None of the above

3)

Which of the following is not a characteristic of the regular, nonsporing gram-positive rods? A)

Aerotolerant

B)

Fermentative metabolism C)

Don't produce endospores D)

Nonpathogenic E)

None of the above

4)

Which of the following is not a characteristic of Neisseria? A)

Requires X and V factors B)

Cocci C)

Gram-negative D)

Oxidase-positive E)

None of the above

5)

Staphylococcus and Streptococcus can be easily differentiated in a laboratory by which one of the following?

A)

Cell shape B)

Gram stain reaction C)

Growth in high salt concentrations D)

Ability to cause disease E)

None of the above

6)

Which of the following genera is an anaerobic gram-negative rod? A)

Escherichia B)

Staphylococcus C)

Bacteroides D)

Treponema E)

None of the above

7)

Which of the following do you expect to be most resistant to high temperatures? A)

Bacillus subtilis B)

Eschericia coli C)

Neisseria gonorrhoeae D)

Staphylococcus aureus E)

Streptococcocus pyogenes

8)

Which of the following is not an enteric? A)

Salmonella B)

Shigella

C)

Escherichia D)

Enterobacter E)

Campylobacter

9)

Which of the following is not a characteristic of spirochetes? A)

Possess an axial filament B)

Gram-negative C)

Helical shape D)

Easily observed with brightfield microscopy E)

Difficult to culture in vitro

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. This bacterium is

A)

Gram-negative. B)

Using anaerobic respiration. C)

A chemoautotroph. D)

A photoautotroph. E)

A photoheterotroph.

11)

Which of the following lacks a cell wall? A)

Borrelia B)

Mycoplasma C)

Mycobacterium D)

Clostridium E)

Nocardia

12)

Which of the following is not gram-positive? A)

Treponema B)

Corynebacterium C)

Bacillus D)

Staphylococcus E)

Mycobacterium

13)

Which of the following form conidiospores? A)

Endospore-forming gram-positive rods and cocci B)

Actinomycetes and related organisms

C)

Rickettsias D)

Anaerobic gram-negative cocci E)

Spiral and curved bacteria

14)

Which of the following pairs is mismatched? A)

Dissimilatory sulfate-reducing bacteria produce H2S B)

Archaea live in extreme environments C)

Chemoautotrophic bacteria fix atmospheric nitrogen D)

Actinomycetes reproduce by fragmentation E)

Cytophaga a gliding, nonfruiting bacterium

15)

Rickettsias differ from chlamydias in that rickettsias A)

Are gram-negative. B)

Are intracellular parasites. C)

Require an arthropod for transmission. D)

Form elementary bodies. E)

None of the above.

16)

Requirements for X and V factors are used to identify A)

Staphylococcus. B)

Escherichia. C)

Neisseria. D)

Haemophilus. E)

None of the above.

17)

You have isolated a bacterium that grows in a medium containing only inorganic nutrients. Ammonia is oxidized to nitrate ion. This bacterium is

A)

Gram-negative. B)

Using anaerobic respiration. C)

A chemoautotroph. D)

A photoautotroph E)

A photoheterotroph.

18)

Which of the following is not gram-negative? A)

Pseudomonas B)

Salmonella C)

Streptococcus D)

Bacteroides E)

Rickettsia

19)

Escherichia coli belongs to the A)

Proteobacteria. B)

Gram-positive bacteria. C)

Green sulfur bacteria. D)

Spirochetes. E)

Actinomycetes.

20)

Which one of the following does not belong with the others? A)

Bacillus B)

Escherichia C)

Lactobacillus D)

Staphylococcus E)

Streptococcus

21)

All of the following are true about the causative agent of Rocky Mountain spotted fever except A)

It is an intracellular parasite. B)

It is transmitted by ticks. C)

It is in the genus Rickettsia. D)

It is gram-negative. E)

It is found in soil and water.

22)

A primary difference between cyanobacteria and purple and green phototrophic bacteria is A)

Energy source. B)

Cell wall type. C)

Electron donor for CO2 reduction. D)

Cell type. E)

Color.

23)

Which one of the following does not belong with the others? A)

Bordetella B)

Burkholderia

C)

Campylobacter D)

Pseudomonas E)

Salmonella

24)

The bacteria responsible for more infections and more different kinds of infections are A)

Streptococcus. B)

Staphylococcus. C)

Salmonella. D)

Pseudomonas. E)

Neisseria.

25)

Both Beggiatoa and the purple sulfur bacteria use H2S. These bacteria differ because Beggiatoa A)

Uses H2S for an energy source. B)

Uses H2S for a carbon source. C)

Uses light energy. D)

Belongs to the gammaproteobacteria E)

Is a heterotroph.

26)

The nonsulfur photosynthetic bacteria use organic compounds as A)

Carbon sources. B)

Electron donors to reduce CO2. C)

Energy sources. D)

Electron acceptors. E)

All of the above.

27)

Which of the following is the best reason to classify Streptococcus in the Lactobacillales? A)

Gram reaction B)

Morphology C)

Fermentation of lactose D)

rRNA sequences E)

All of the above.

28)

Streptomyces differs from Actinomyces because Streptomyces A)

Makes antibiotics. B)

Produces conidia.

C)

Forms filaments. D)

Is aerobic. E)

None of the above.

29)

All of the following are gram-positive. Which does not belong with the others? A)

Actinomyces B)

Bacillus C)

Corynebacterium D)

Listeria E)

Mycobacterium

30)

Salmonella, Shigella, Yersinia, and Serratia are all A)

Pathogens. B)

Gram-negative facultatively anaerobic rods. C)

Gram-positive aerobic cocci. D)

Fermentative. E)

None of the above.

31)

You have isolated a gram-positive rod. What should you do next? A)

Gram stain B)

Lactose fermentation C)

Endospore stain D)

Flagella stain E)

Enterotube

32)

Borrelia is classified as a spirochete because it A)

Is aerobic. B)

Possesses an axial filament. C)

Is a rod. D)

Is a pathogen. E)

None of the above.

33)

Thiobacillus oxidizes inorganic sulfur compounds and reduces CO2. This bacterium is A)

A chemoheterotroph B)

A chemoautotroph

C)

A photoautotroph D)

A γ-proteobacteria E)

None of the above.

34)

You have isolated a prokaryotic cell. The first step in identification is a(n) A)

Gram stain. B)

Lactose fermentation test. C)

Endospore stain. D)

Flagella stain. E)

DNA fingerprint.

35)

Actinomycetes differ from fungi because actinomycetes A)

Are chemoheterotrophs. B)

Lack a membrane-bounded nucleus. C)

Require light. D)

Are decomposers. E)

Cause disease.

36)

You have isolated an aerobic gram-positive, endospore-forming bacterium that grows wells on nutrient agar. To which of the following groups does it most likely belong?

A)

Phototrphic bacteria B)

Gammaproteobacteria C)

Deltaproteobacteria D)

Bacillales E)

Can't tell

37)

Which of the following pairs is mismatched? A)

Spirochete axial filament B)

Aerobic, helical bacteria gram-negative C)

Enterics gram-negative D)

Mycobacteria acid-fast E)

None of the above

38)

Which one of the following does not belong with the others? A)

Coxiella B)

Ehrlichia C)

Rickettsia D)

Staphylococcus E)

None of the above

39)

Caulobacter are different from most bacteria because A)

They are gram-negative. B)

They are gram-positive. C)

They have stalks. D)

They lack cell walls. E)

None of the above.

40)

Pathogenic bacteria are easily identified because they A)

Are motile. B)

Are gram-negative. C)

Produce endospores. D)

Grow at 37°C. E)

None of the above.

41)

Which of the following does not belong with the others? A)

Halobacterium B)

Halococcus C)

Methanobacterium D)

Staphylococcus E)

Sulfolobus

42)

What should you do if you suspect a patient has tuberculosis? A)

A Gram stain. B)

An acid-fast stain. C)

Check for motility. D)

Look at a wet mount.

43)

All of the following are motile; which does not have flagella? A)

Enterics B)

Helical bacteria C)

Pseudomonas

D)

Spirochetes E)

None of the above

44)

Mycoplasmas differ from other bacteria because they A)

Grow inside host cells. B)

Lack a cell wall. C)

Are acid-fast. D)

Are motile. E)

None of the above.

45)

Which of the following pairs is not correctly matched? A)

Elementary body Escherichia B)

Endospore Bacillus C)

Endospore Clostridium D)

Heterocyst cyanobacteria E)

Myxospore gliding bacteria