BROCK BIOLOGY OF
MICROORGANISMS CHAPTER 15
f Which phylum harbors the MOST functional diversity observed and also has the MOST cultured
representatives? - Proteobacteria
Isolating a bacterium of the ________ class would be of high impact due to it only having one cultured
representative. - Zetaproteobacteria
A pink-pigmented facultative methylotrophic bacterium is LEAST likely to be a classified as a member of -
Rhodobacter
Which genus would you MOST likely find in the photic layer of the oceans due to its abundance and
aerobic chemoorganotroph phenotype? - Pelagibacter
Which of the following traits is NOT characteristic of Caulobacter? - abundant in aquatic habitats rich in
nutrients
Treating wastewater requires the removal of organic material, and an ideal phenotype of a bacterium to
do this would flocculate to make the cells settle (rather than staying in suspension) in a wastewater
stream. Which species would be best for this application? - Zoogloea ramigera
While not all members of ________ are pathogenic, two medically relevant species cause meningitis and
gonorrhea in humans. - Neisseria
Chemolithotrophic ammonia-oxidization is a metabolic requirement for members of - Nitrosomonas and
Nitrosospira.
Biosynthesis of vitamin K (menaquinone) by ________ spp. inhabiting the ________ of humans is a
potentially important mutualistic relationship for human health. - Escherichia / intestinal tract
A gram-negative, polarly flagellated, aerobic bacillus-shaped bacterium that can degrade a large variety
or aromatic compounds is likely a(n) - sphingomonad.
Which characteristic is NOT associated with Vibrio spp.? - gliding motility
A pseudomonad that loses its R plasmid in the soil is LEAST likely to - survive a habitat dominated by
antibiotic-producing Streptomyces spp.
Which of the following is NOT a member of the Deltaproteobacteria? - Campylobacter
Which of the following is NOT a trait of rickettsias? - They lack cell walls.
Which relationship is MOST likely to be observed between species of different classes? - An
epsilonbacterium oxidizes the hydrogen sulfide produced by a sulfur-reducing deltaproteobacterium.
, A bacterium with which metabolism is MOST likely to form a relationship with Syntrophobacter wolinii? -
molecular hydrogen oxidation
Based on oxygen requirements and metabolic strategies, isolating an epsilonproteobacterium from
________ would likely be MOST fruitful. - sulfate-rich anoxic-oxic interfaces
Which of the following is NOT true of Epsilonproteobacteria? - Epsilonproteobacteria are prolific metal
reducers.
Which taxon is NOT gram-positive? - Sphingobacteria
Which feature(s) differentiate(s) Actinobacteria from Firmicutes? - relative G+C content in their genomes
The order Lactobacillales within Firmicutes are also called the lactic acid bacteria, because these bacteria
- produce lactate.
What would MOST likely result if an exponentially growing culture of Lactobacillus sp. fermenting
glucose was accidentally transferred into a highly aerated environment? - Fermentation of glucose would
continue, because the cells are insensitive to O2 despite lacking aerobic metabolism capabilities.
Which bacterial genus would be best to select for fermenting cabbage to make homemade sauerkraut? -
Lactobacillus
Which phenotypic assay could be used to determine whether a new Streptococcus sp. is of the pyogenes
or viridans group? - occurrence of cells being in clusters or as individual cells under a microscope
Staphylococcus aureus is known to cause ALL of the following diseases EXCEPT
A) acne.
B) arthritis.
C) boils.
D) dental caries. - Dental caries
Which species does NOT produce endospores?
A) Bacillus cereus
B) Clostridium pasteurianum
C) Listeria monocytogenes
D) Paenibacillus popilliae - Listeria monocytogenes
A gram-negative, nonsporulating rod that is highly motile, oxidase negative, facultatively aerobic,
ferments glucose, and urease-positive is likely to be of which genus? - Proteus
A yogurt, which had "contains live cultures" on its label, was transferred onto an acidic carbohydrate-
containing medium for selective enrichment. Eventually, isolates of the ________ genus were obtained. -
Lactobacillus
MICROORGANISMS CHAPTER 15
f Which phylum harbors the MOST functional diversity observed and also has the MOST cultured
representatives? - Proteobacteria
Isolating a bacterium of the ________ class would be of high impact due to it only having one cultured
representative. - Zetaproteobacteria
A pink-pigmented facultative methylotrophic bacterium is LEAST likely to be a classified as a member of -
Rhodobacter
Which genus would you MOST likely find in the photic layer of the oceans due to its abundance and
aerobic chemoorganotroph phenotype? - Pelagibacter
Which of the following traits is NOT characteristic of Caulobacter? - abundant in aquatic habitats rich in
nutrients
Treating wastewater requires the removal of organic material, and an ideal phenotype of a bacterium to
do this would flocculate to make the cells settle (rather than staying in suspension) in a wastewater
stream. Which species would be best for this application? - Zoogloea ramigera
While not all members of ________ are pathogenic, two medically relevant species cause meningitis and
gonorrhea in humans. - Neisseria
Chemolithotrophic ammonia-oxidization is a metabolic requirement for members of - Nitrosomonas and
Nitrosospira.
Biosynthesis of vitamin K (menaquinone) by ________ spp. inhabiting the ________ of humans is a
potentially important mutualistic relationship for human health. - Escherichia / intestinal tract
A gram-negative, polarly flagellated, aerobic bacillus-shaped bacterium that can degrade a large variety
or aromatic compounds is likely a(n) - sphingomonad.
Which characteristic is NOT associated with Vibrio spp.? - gliding motility
A pseudomonad that loses its R plasmid in the soil is LEAST likely to - survive a habitat dominated by
antibiotic-producing Streptomyces spp.
Which of the following is NOT a member of the Deltaproteobacteria? - Campylobacter
Which of the following is NOT a trait of rickettsias? - They lack cell walls.
Which relationship is MOST likely to be observed between species of different classes? - An
epsilonbacterium oxidizes the hydrogen sulfide produced by a sulfur-reducing deltaproteobacterium.
, A bacterium with which metabolism is MOST likely to form a relationship with Syntrophobacter wolinii? -
molecular hydrogen oxidation
Based on oxygen requirements and metabolic strategies, isolating an epsilonproteobacterium from
________ would likely be MOST fruitful. - sulfate-rich anoxic-oxic interfaces
Which of the following is NOT true of Epsilonproteobacteria? - Epsilonproteobacteria are prolific metal
reducers.
Which taxon is NOT gram-positive? - Sphingobacteria
Which feature(s) differentiate(s) Actinobacteria from Firmicutes? - relative G+C content in their genomes
The order Lactobacillales within Firmicutes are also called the lactic acid bacteria, because these bacteria
- produce lactate.
What would MOST likely result if an exponentially growing culture of Lactobacillus sp. fermenting
glucose was accidentally transferred into a highly aerated environment? - Fermentation of glucose would
continue, because the cells are insensitive to O2 despite lacking aerobic metabolism capabilities.
Which bacterial genus would be best to select for fermenting cabbage to make homemade sauerkraut? -
Lactobacillus
Which phenotypic assay could be used to determine whether a new Streptococcus sp. is of the pyogenes
or viridans group? - occurrence of cells being in clusters or as individual cells under a microscope
Staphylococcus aureus is known to cause ALL of the following diseases EXCEPT
A) acne.
B) arthritis.
C) boils.
D) dental caries. - Dental caries
Which species does NOT produce endospores?
A) Bacillus cereus
B) Clostridium pasteurianum
C) Listeria monocytogenes
D) Paenibacillus popilliae - Listeria monocytogenes
A gram-negative, nonsporulating rod that is highly motile, oxidase negative, facultatively aerobic,
ferments glucose, and urease-positive is likely to be of which genus? - Proteus
A yogurt, which had "contains live cultures" on its label, was transferred onto an acidic carbohydrate-
containing medium for selective enrichment. Eventually, isolates of the ________ genus were obtained. -
Lactobacillus
