Question 1

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

Accepted Answer

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

Question 2

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?

Accepted Answer

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

Question 3

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

Accepted Answer

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 A

Question 4

Which of the following is not a characteristic of spirochetes?

Accepted Answer

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

Borrelia is classified as a spirochete because it

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

Escherichia coli belongs to the

Accepted Answer

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

Question 8

Which of the following lacks a cell wall?

Accepted Answer

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

Question 9

Which of the following is not an enteric?

Accepted Answer

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

Question 10

Salmonella, Shigella, Yersinia, and Serratia are all

Accepted Answer

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

Question 11

Which of the following does not belong with the others?

Accepted Answer

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

Question 12

Which of the following pairs is mismatched?

Accepted Answer

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

Question 13

Streptomyces differs from Actinomyces because Streptomyces

Accepted Answer

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

Question 14

Which of the following form conidiospores?

Accepted Answer

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 15

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

Accepted Answer

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

Question 16

Which of the following is not a characteristic of Neisseria?

Accepted Answer

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

Question 17

The nonsulfur photosynthetic bacteria use organic compounds as

Accepted Answer

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

Question 18

Which of the following is not gram- positive?

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

Requirements for X and V factors are used to identify

Accepted Answer

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

Exam 11: The Prokaryotes: Domains Bacteria and Archaea