NAIMMCQ: Microbiology

Microbiology

Showing posts with label Microbiology. Show all posts

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

Answer: A

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.

Answer: B

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

Answer: D

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.

Answer: B

Which of the following does not belong with the others?

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

Answer: D

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.

Answer: E

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.

Answer: C

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

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

Answer: D

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

Answer: C

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

Answer: D

Actinomycetes differ from fungi because actinomycetes

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

Answer: B

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.

Answer: A

Thiobacillus oxidizes inorganic sulfur compounds and reduces CO 2. This bacterium is

A) A chemoheterotroph
B) A chemoautotroph
C) A photoautotroph
D) A ?-proteobacteria
E) None of the above.

Answer: B

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.

Answer: B

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

Answer: C

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.

Answer: B

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

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

Answer: E

Streptomyces differs from Actinomyces because Streptomyces

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

Answer: D

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.

Answer: D

The nonsulfur photosynthetic bacteria use organic compounds as

A) Carbon sources.
B) Electron donors to reduce CO 2.
C) Energy sources.
D) Electron acceptors.
E) All of the above.

Answer: B