Ch 11 Micro

Which of the following are found primarily in the intestines of humans?
A) Gram-negative aerobic rods and cocci
B) Facultatively anaerobic gram-negative rods
C) Aerobic, helical bacteria
D) Endospore-forming rods
E) Gram-positive cocci

Which of the following is NOT a characteristic of the non-endospore-forming gram-positive rods?
A) Don't produce endospores
B) Are nonpathogenic
C) Are aerotolerant
D) Lack cell walls
E) Carry out fermentative metabolism

Which of the following is NOT a characteristic of Neisseria?
A) Cocci
B) Oxidase-positive
C) Requires X and V factors
D) Some species are human pathogens.
E) Gram-negative

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) Cell shape
D) Ability to cause disease
E) Glucose fermentation

Which of the following genera is an anaerobic gram-negative rod?
A) Treponema
B) Staphylococcus
C) Bacteroides
D) Neisseria
E) Escherichia

Which of the following do you expect to be most resistant to high temperatures?
A) Staphylococcus aureus
B) Bacillus subtilis
C) Eschericia coli
D) Neisseria gonorrhoeae
E) Streptococcocus pyogenes

Which of the following is NOT an enteric?
A) Campylobacter
B) Escherichia
C) Salmonella
D) Shigella
E) Enterobacter

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

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. You can be sure that this bacterium is
A) A chemoautotroph.
B) Using anaerobic respiration
C) A photoheterotroph.
D) Gram-positive.
E) A photoautotroph.

Which of the following lacks a cell wall?
A) Mycoplasma
B) Clostridium
C) Mycobacterium
D) Nocardia
E) Borrelia

Which of the following bacteria is gram-negative?
A) Treponema
B) Staphylococcus
C) Bacillus
D) Corynebacterium
E) Mycobacterium

Which of the following form conidiospores?
A) Actinomycetes and related organisms
B) Rickettsias
C) Endospore-forming gram-positive rods and cocci
D) Anaerobic gram-negative cocci
E) Spiral and curved bacteria

Which of the following pairs is mismatched?
A) Cytophaga – a gliding, nonfruiting bacterium
B) Dissimilatory sulfate-reducing bacteria – produce H2S
C) Actinomycetes – reproduce by fragmentation
D) Chemoautotrophic bacteria – fix atmospheric nitrogen
E) Archaea – extremophiles

Rickettsias differ from chlamydias in that rickettsias
A) Are intracellular parasites.
B) Lack cell walls.
C) Are gram-negative.
D) Form elementary bodies.
E) Require an arthropod for transmission.

Requirements for X and V factors are used to identify
A) Pseudomonas
B) Haemophilus.
C) Escherichia.
D) Staphylococcus.
E) Neisseria.

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) Gram-negative.
C) A chemoautotroph.
D) A photoautotroph
E) A photoheterotroph.

Which of the following bacteria is gram-positive?
A) Salmonella
B) Bacteroides
C) Pseudomonas
D) Rickettsia
E) Streptococcus

Escherichia coli belongs to the
A) Actinomycetes.
B) Gram-positive bacteria.
C) Spirochetes.
D) Green sulfur bacteria.
E) Proteobacteria.

Which one of the following bacteria does NOT belong with the others?
A) Escherichia
B) Bacillus
C) Lactobacillus
D) Streptococcus
E) Staphylococcus

Which of the following statements about the causative agent of Rocky Mountain spotted fever is false?
A) It is transmitted by ticks.
B) It is found in soil and water
C) It is gram-negative.
D) It is in the genus Rickettsia.
E) It is an intracellular parasite.

A primary difference between cyanobacteria and purple and green phototrophic bacteria is
A) Electron donor for CO2 reduction.
B) Cell type.
C) Energy source.
D) Cell wall type.
E) Color.

Which one of the following bacteria does NOT belong with the others?
A) Pseudomonas
B) Burkholderia
C) Bordetella
D) Campylobacter
E) Salmonella

Which of the following bacteria are responsible for more infections and more different kinds of infections?
A) Staphylococcus
B) Streptococcus
C) Neisseria
D) Pseudomonas
E) Salmonella

Both Beggiatoa and the purple sulfur bacteria use H2S. These bacteria differ in that Beggiatoa
A) Uses H2S for an energy source.
B) Belongs to the gammaproteobacteria.
C) Uses light energy.
D) Uses H2S for a carbon source.
E) Is a heterotroph.

The nonsulfur photosynthetic bacteria use organic compounds as
A) Electron donors to reduce CO2.
B) Carbon sources.
C) Electron acceptors.
D) Energy sources.
E) Oxygen sources.

Which of the following is the best reason to classify Streptococcus in the Lactobacillales?
A) Fermentation of lactose
B) Gram reaction
C) Morphology
D) rRNA sequences
E) Found in dairy products

Streptomyces differs from Actinomyces because Streptomyces
A) Produces conidia.
B) Makes antibiotics.
C) Is a bacterium.
D) Forms filaments.
E) Is aerobic.

All of the following bacteria are gram-positive. Which does NOT belong with the others?
A) Corynebacterium
B) Mycobacterium
C) Actinomyces
D) Listeria
E) Bacillus

Salmonella, Shigella, Yersinia, and Serratia are all
A) Fermentative.
B) Endospore-forming bacteria.
C) Gram-negative facultatively anaerobic rods.
D) Gram-positive aerobic cocci.
E) Pathogens.

You have isolated a gram-positive rod. What should you do next?
A) Flagella stain
B) Endospore stain
C) Lactose fermentation
D) Gram stain
E) Enterotube

Borrelia is classified as a spirochete because it
A) Is a rod.
B) Is a pathogen.
C) Possesses an axial filament.
D) Is transmitted by ticks.
E) Is aerobic.

Thiobacillus oxidizes inorganic sulfur compounds and reduces CO2. This bacterium is a
A) Chemoheterotroph.
B) Photoheterotroph.
C) Gammaproteobacteria.
D) Photoautotroph.
E) Chemoautotroph.

You have isolated a prokaryotic cell. The first step in identification is a(n)
A) Gram stain.
B) DNA fingerprint.
C) Lactose fermentation test.
D) Endospore stain.
E) Flagella stain.

Actinomycetes differ from fungi in that actinomycetes
A) Are decomposers.
B) Lack a membrane-bounded nucleus.
C) Are chemoheterotrophs.
D) Cause disease
E) Require light.

You have isolated an aerobic gram-positive, endospore-forming bacterium that grows well on nutrient agar. To which of the following groups does it most likely belong?
A) Bacillales
B) Phototrophic bacteria
C) Deltaproteobacteria
D) Can't tell
E) Gammaproteobacteria

Which of the following pairs is mismatched?
A) Mycobacteria – acid-fast
B) Spirochete – axial filament
C) Pseudomonas – gram-positive
D) Aerobic, helical bacteria – gram-negative
E) Enterics – gram-negative

Which one of the following does NOT belong with the others?
A) Rickettsia
B) Coxiella
C) Ehrlichia
D) Wolbachia
E) Staphylococcus

Caulobacter are different from most bacteria in that
A) They are gram-negative.
B) They are gram-positive.
C) They lack cell walls.
D) They are motile.
E) They have stalks.

All of the following bacteria are motile; which does (do) NOT have flagella?
A) Salmonella
B) Escherichia
C) Spirochetes
D) Helical bacteria
E) Pseudomonas

Which of the following bacteria does NOT belong with the others?
A) Methanobacterium
B) Staphylococcus
C) Halococcus
D) Halobacterium
E) Sulfolobus

Mycoplasmas differ from other bacteria in that they
A) Are gram-negative
B) Lack a cell wall.
C) Are acid-fast.
D) Grow inside host cells.
E) Are motile.

Which of the following pairs is NOT correctly matched?
A) Myxospore – gliding bacteria
B) Endospore – Bacillus
C) Elementary body – Escherichia
D) Heterocyst – cyanobacteria
E) Endospore – Clostridium

Burkholderia was reclassified from the gammaproteobacteria to the betaproteobacteria because
A) Its rRNA sequence is similar to that of Neisseria.
B) It is a gram-negative rod.
C) It grows in disinfectants.
D) It causes melioidosis.
E) It causes infections in cystic fibrosis patients.

The crab industry needs female crabs for growing more crabs. What bacterium might be used to ensure development of female crabs and shrimp?
A) Wolbachia
B) Acinetobacter
C) Pelagibacter
D) Neisseria
E) Gemmata