Deck 11: The Prokaryotes: Domains Bacteria and Archaea

Question 1

Rickettsias differ from chlamydias in that rickettsias

A) Are gram- negative.
B) Are intracellular parasites.
C) Form elementary bodies.
D) Require an arthropod for transmission.
E) None of the above.

Answer 1

Require an arthropod for transmission.

Question 2

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

A) Staphylococcus
B) Coxiella
C) Ehrlichia
D) Rickettsia
E) None of the above

Answer 2

Staphylococcus

Question 3

Requirements for X and V factors are used to identify

A) Neisseria.
B) Haemophilus.
C) Staphylococcus.
D) Escherichia.
E) None of the above.

Answer 3

Haemophilus.

Question 4

Which of the following is not a characteristic of spirochetes?

A) Gram- negative
B) Easily observed with brightfield microscopy
C) Possess an axial filament
D) Helical shape
E) Difficult to culture in vitro

Question 5

Which of the following is not a characteristic of Neisseria?

A) Oxidase- positive
B) Cocci
C) Requires X and V factors
D) Gram- negative
E) None of the above

Question 6

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

A) Gram stain reaction
B) Growth in high salt concentrations
C) Ability to cause disease
D) Cell shape
E) None of the above

Question 7

Pathogenic bacteria are easily identified because they

A) Produce endospores.
B) Are motile.
C) Are gram- negative.
D) Grow at 37°C.
E) None of the above.

Question 8

Salmonella, Shigella, Yersinia, and Serratia are all

A) Gram- positive aerobic cocci.
B) Pathogens.
C) Gram- negative facultatively anaerobic rods.
D) Fermentative.
E) None of the above.

Question 9

Which of the following is not gram- negative?

A) Bacteroides
B) Pseudomonas
C) Rickettsia
D) Salmonella
E) Streptococcus

Question 10

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

A) Neisseria.
B) Staphylococcus.
C) Streptococcus.
D) Salmonella.
E) Pseudomonas.

Question 11

Borrelia is classified as a spirochete because it

A) Is a pathogen.
B) Is aerobic.
C) Possesses an axial filament.
D) Is a rod.
E) None of the above.

Question 12

The nonsulfur photosynthetic bacteria use organic compounds as

A) Electron donors to reduce CO?.
B) Energy sources.
C) Carbon sources.
D) Electron acceptors.
E) All of the above.

Question 13

Both Beggiatoa and the purple sulfur bacteria use H?S. These bacteria differ because Beggiatoa

A) Belongs to the gammaproteobacteria
B) Uses H₂S for an energy source.
C) Uses light energy.
D) Is a heterotroph.
E) Uses H₂S for a carbon source.

Question 14

Caulobacter are different from most bacteria because

A) They have stalks.
B) They lack cell walls.
C) They are gram- negative.
D) They are gram- positive.
E) None of the above.

Question 15

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

A) Aerotolerant
B) Don't produce endospores
C) Fermentative metabolism
D) Nonpathogenic
E) None of the above

Question 16

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

A) Using anaerobic respiration.
B) A chemoautotroph.
C) A photoheterotroph.
D) A photoautotroph
E) Gram- negative.

Question 17

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

A) Treponema
B) Bacteroides
C) Escherichia
D) Staphylococcus
E) None of the above

Question 18

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

A) Campylobacter
B) Bordetella
C) Burkholderia
D) Pseudomonas
E) Salmonella

Question 19

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

A) Facultatively anaerobic gram- negative rods
B) Aerobic, helical bacteria
C) Gram- positive cocci
D) Gram- negative aerobic rods and cocci
E) None of the above

Question 20

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

A) It is gram- negative.
B) It is found in soil and water.
C) It is an intracellular parasite.
D) It is transmitted by ticks.
E) It is in the genus Rickettsia.

Question 21

Mycoplasmas differ from other bacteria because they

A) Are acid- fast.
B) Are motile.
C) Grow inside host cells.
D) Lack a cell wall.
E) None of the above.

Question 22

Which of the following pairs is mismatched?

A) Actinomycetes - reproduce by fragmentation
B) Chemoautotrophic bacteria - fix atmospheric nitrogen
C) Archaea - live in extreme environments
D) Dissimilatory sulfate- reducing bacteria - produce H?S
E) Cytophaga - a gliding, nonfruiting bacterium

Question 23

Escherichia coli belongs to the

A) Actinomycetes.
B) Spirochetes.
C) Green sulfur bacteria.
D) Proteobacteria.
E) Gram- positive bacteria.

Question 24

Which of the following is a characteristic of Clostridium?

A) Mycobacteria
B) Endospore- forming cocci
C) Gram- negative aerobic cocci
D) Anaerobic gram- negative rods
E) None of the above

Question 25

Which of the following form conidiospores?

A) Rickettsias
B) Spiral and curved bacteria
C) Actinomycetes and related organisms
D) Anaerobic gram- negative cocci
E) Endospore- forming gram- positive rods and cocci

Question 26

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

A) Energy source.
B) Color.
C) Cell wall type.
D) Electron donor for CO₂ reduction.
E) Cell type.

Question 27

Actinomycetes differ from fungi because actinomycetes

A) Require light.
B) Are decomposers.
C) Lack a membrane- bounded nucleus.
D) Are chemoheterotrophs.
E) Cause disease.

Question 28

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) Deltaproteobacteria
B) Phototrphic bacteria
C) Bacillales
D) Gammaproteobacteria
E) Can't tell

Question 29

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

A) Look at a wet mount.
B) An acid- fast stain.
C) A Gram stain.
D) Check for motility.

Question 30

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

A) Lactose fermentation
B) Flagella stain
C) Enterotube
D) Gram stain
E) Endospore stain

Question 31

Streptomyces differs from Actinomyces because Streptomyces

A) Is aerobic.
B) Produces conidia.
C) Forms filaments.
D) Makes antibiotics.
E) None of the above.

Question 32

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

A) Morphology
B) rRNA sequences
C) Gram reaction
D) Fermentation of lactose
E) All of the above.

Question 33

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

A) A chemoautotroph
B) A photoautotroph
C) A chemoheterotroph
D) A gammaproteobacteria
E) None of the above.

Question 34

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) A chemoautotroph.
B) Using anaerobic respiration.
C) A photoautotroph.
D) Gram- negative.
E) A photoheterotroph.

Question 35

Which of the following pairs is mismatched?

A) Mycobacteria - acid- fast
B) Aerobic, helical bacteria - gram- negative
C) Spirochete - axial filament
D) Enterics - gram- negative
E) None of the above

Question 36

Which of the following is not gram- positive?

A) Mycobacterium
B) Bacillus
C) Staphylococcus
D) Treponema
E) Corynebacterium

Question 37

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

A) Spirochetes
B) Pseudomonas
C) Helical bacteria
D) Enterics
E) None of the above

Question 38

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

A) Bacillus
B) Escherichia
C) Staphylococcus
D) Streptococcus
E) Lactobacillus

Question 39

Which of the following does not belong with the others?

A) Methanobacterium
B) Sulfolobus
C) Staphylococcus
D) Halobacterium
E) Halococcus

Question 40

Which of the following is not an enteric?

A) Enterobacter
B) Escherichia
C) Salmonella
D) Campylobacter
E) Shigella

Question 41

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

A) Listeria
B) Corynebacterium
C) Mycobacterium
D) Actinomyces
E) Bacillus

Question 42

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

A) Flagella stain.
B) Gram stain.
C) Endospore stain.
D) DNA fingerprint.
E) Lactose fermentation test.

Question 43

Which of the following pairs is not correctly matched?

A) Heterocyst - cyanobacteria
B) Endospore - Clostridium
C) Endospore - Bacillus
D) Elementary body - Escherichia
E) Myxospore - gliding bacteria

Question 44

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

A) Staphylococcus aureus
B) Streptococcocus pyogenes
C) Eschericia coli
D) Neisseria gonorrhoeae
E) Bacillus subtilis

Question 45

Which of the following lacks a cell wall?

A) Clostridium
B) Mycobacterium
C) Nocardia
D) Mycoplasma
E) Borrelia