Question 1

The additional supplementation of ________ make developing growth media for culturing mycoplasmas especially challenging.

Accepted Answer

A)  unsaturated fatty acids 
B)  sterols 
C)  vitamins 
D)  unsaturated fatty acids, sterols, and vitamins 
A)  unsaturated fatty acids 
B)  sterols 
C)  vitamins 
D)  unsaturated fatty acids, sterols, and vitamins D

Question 2

Which group of bacteria is most famous for their diversity of antibiotics produced? Hypothesize an ecological role production of these antibiotics might have in such environments where they are not produced at high enough levels to kill bacteria.

Accepted Answer

The Streptomyces are well-known for producing hundreds of structurally diverse antibiotics.Even if their production levels in the natural environment are low,they might still serve as stressors to neighboring bacteria.Another possibility is production of certain antibiotics fosters a mutualistic relationship with other microorganisms that can catabolize the substrates.For antibiotics produced during stationary phase,a third possible role could be that they serve as signaling molecules for nutrient availability and/or cell concentration.

Question 3

Which bacterial genus is LEAST related to the others listed?

Accepted Answer

A)  Actinomyces 
B)  Mycobacterium 
C)  Nocardia 
D)  Streptomyces 
A)  Actinomyces 
B)  Mycobacterium 
C)  Nocardia 
D)  Streptomyces B

Question 4

A pseudomonad that loses its R plasmid in the soil is LEAST likely to

Accepted Answer

A)  cause an infection in a human. 
B)  colonize a surface. 
C)  infect a shrub. 
D)  survive a habitat dominated by antibiotic-producing Streptomyces spp. 
A)  cause an infection in a human. 
B)  colonize a surface. 
C)  infect a shrub. 
D)  survive a habitat dominated by antibiotic-producing Streptomyces spp.

Question 5

Which of the following is NOT a member of the Deltaproteobacteria?

Accepted Answer

A)  Campylobacter 
B)  Desulfovibrio 
C)  Geobacter 
D)  Syntrophobacter 
A)  Campylobacter 
B)  Desulfovibrio 
C)  Geobacter 
D)  Syntrophobacter

Question 6

A bacterium with which metabolism is MOST likely to form a relationship with Syntrophobacter wolinii?

Accepted Answer

A)  acetate oxidation 
B)  ammonia oxidation 
C)  molecular hydrogen oxidation 
D)  propionate catabolism 
A)  acetate oxidation 
B)  ammonia oxidation 
C)  molecular hydrogen oxidation 
D)  propionate catabolism

Question 7

Which phenotypic assay could be used to determine whether a new Streptococcus sp.is of the pyogenes or viridans group?

Accepted Answer

A)  catalase assay with H₂O₂ 
B)  hemolytic type after growth on a blood agar plate 
C)  occurrence of cells being in clusters or as individual cells under a microscope 
D)  product(s) formed during lactose fermentation 
A)  catalase assay with H₂O₂ 
B)  hemolytic type after growth on a blood agar plate 
C)  occurrence of cells being in clusters or as individual cells under a microscope 
D)  product(s) formed during lactose fermentation

Question 8

Some species in the genus Acidobacteria are classified in Bacteria while others are considered Archaea.

Accepted Answer

A) True 
 B)False

Question 9

Even to a well-trained microbiologist,isolates of Streptomyces when grown on a nutrient agar plate can appear as though they are fungi.Describe key similarities of how these two unrelated groups can so easily be mistaken for each other,and then propose methods to conclusively distinguish between them.

Accepted Answer

To the naked eye,Streptomyces appear fuz

Question 10

Which of the following traits is NOT characteristic of Caulobacter?

Accepted Answer

A)  abundant in aquatic habitats rich in nutrients 
B)  produces a cytoplasmic outgrowth (prostheca) 
C)  attaches to surfaces in nature 
D)  asymmetric cell division 
A)  abundant in aquatic habitats rich in nutrients 
B)  produces a cytoplasmic outgrowth (prostheca) 
C)  attaches to surfaces in nature 
D)  asymmetric cell division

Question 11

Which bacillus-shaped genus are primarily intracellular parasites of arthropods such as crustaceans and insects?

Accepted Answer

A)  Coxiella 
B)  Klebsiella 
C)  Roseospirillum 
D)  Wolbachia 
A)  Coxiella 
B)  Klebsiella 
C)  Roseospirillum 
D)  Wolbachia

Question 12

The ________ produce over 500 characterized antibiotics.

Accepted Answer

A)  Bacteroidetes 
B)  mycobacteria 
C)  pseudomonads 
D)  streptomycetes 
A)  Bacteroidetes 
B)  mycobacteria 
C)  pseudomonads 
D)  streptomycetes

Question 13

Snapping division is a hallmark trait of ________ which can be visualized under a microscope by ________.

Accepted Answer

A)  Actinobacteria / two adjacent cells linked, appearing as an M dividing into four 
B)  Actinobacteria / one cell appearing as a V dividing into two 
C)  Coryneform bacteria / two adjacent cells linked, appearing as an M dividing into four 
D)  Coryneform bacteria / one cell appearing as a V dividing into two 
A)  Actinobacteria / two adjacent cells linked, appearing as an M dividing into four 
B)  Actinobacteria / one cell appearing as a V dividing into two 
C)  Coryneform bacteria / two adjacent cells linked, appearing as an M dividing into four 
D)  Coryneform bacteria / one cell appearing as a V dividing into two

Question 14

Many gammaproteobacteria members are obligate intracellular symbionts of eukaryotes,which also enables many to become human pathogens.

Accepted Answer

A) True 
 B)False

Question 15

While not all members of ________ are pathogenic,two medically relevant species cause meningitis and gonorrhea in humans.

Accepted Answer

A)  Enterobacter 
B)  Neisseria 
C)  Shigella. 
D)  Staphylococcus 
A)  Enterobacter 
B)  Neisseria 
C)  Shigella. 
D)  Staphylococcus

Question 16

Agrobacterium tumefaciens can form root nodules in plants and can mate with bacteria,which makes it an excellent host organism for genetic transformations among different domains of life.

Accepted Answer

A) True 
 B)False

Question 17

Which feature(s)differentiate(s)Actinobacteria from Firmicutes?

Accepted Answer

A)  absence/presence of a cell wall 
B)  endospore production capability 
C)  motility and chemotaxis abilities 
D)  relative G+C content in their genomes 
A)  absence/presence of a cell wall 
B)  endospore production capability 
C)  motility and chemotaxis abilities 
D)  relative G+C content in their genomes

Question 18

Members of the ________ genus are the MOST abundant bacteria present in the large intestine of humans and contain the unusual ________ in their cell membranes.

Accepted Answer

A)  Bacteroides / glycerolipids 
B)  Bacteroides / sphingolipids 
C)  Sphingobium / glycerolipids 
D)  Sphingobium / sphingolipids 
A)  Bacteroides / glycerolipids 
B)  Bacteroides / sphingolipids 
C)  Sphingobium / glycerolipids 
D)  Sphingobium / sphingolipids

Question 19

Deinococcus radiodurans is capable of withstanding especially high levels of radiation,and the carotenoids they produce enhance this resistance.

Accepted Answer

A) True 
 B)False

Question 20

Which relationship is MOST likely to be observed between species of different classes?

Accepted Answer

A)  A deltaproteobacterium oxidizes hydrogen sulfide into sulfate, which is then reduced by an epsilonproteobacterium. 
B)  An epsilonbacterium oxidizes the hydrogen sulfide produced by a sulfur-reducing deltaproteobacterium. 
C)  A sulfate-reducing epsilonbacterium produces sulfite, which a deltaproteobacterium reduces to hydrogen sulfide. 
D)  Syntrophic metabolism of sulfur by a deltaproteobacterium and an epsilonproteobacterium occurs. 
A)  A deltaproteobacterium oxidizes hydrogen sulfide into sulfate, which is then reduced by an epsilonproteobacterium. 
B)  An epsilonbacterium oxidizes the hydrogen sulfide produced by a sulfur-reducing deltaproteobacterium. 
C)  A sulfate-reducing epsilonbacterium produces sulfite, which a deltaproteobacterium reduces to hydrogen sulfide. 
D)  Syntrophic metabolism of sulfur by a deltaproteobacterium and an epsilonproteobacterium occurs.

Exam 15: Diversity of Bacteria

The additional supplementation of ________ make developing growth media for culturing mycoplasmas especially challenging.

Which group of bacteria is most famous for their diversity of antibiotics produced? Hypothesize an ecological role production of these antibiotics might have in such environments where they are not produced at high enough levels to kill bacteria.

Which bacterial genus is LEAST related to the others listed?

A pseudomonad that loses its R plasmid in the soil is LEAST likely to

Which of the following is NOT a member of the Deltaproteobacteria?

A bacterium with which metabolism is MOST likely to form a relationship with Syntrophobacter wolinii?

Which phenotypic assay could be used to determine whether a new Streptococcus sp.is of the pyogenes or viridans group?

Some species in the genus Acidobacteria are classified in Bacteria while others are considered Archaea.

Which of the following traits is NOT characteristic of Caulobacter?

Which bacillus-shaped genus are primarily intracellular parasites of arthropods such as crustaceans and insects?

The ________ produce over 500 characterized antibiotics.

Snapping division is a hallmark trait of ________ which can be visualized under a microscope by ________.

Many gammaproteobacteria members are obligate intracellular symbionts of eukaryotes,which also enables many to become human pathogens.

While not all members of ________ are pathogenic,two medically relevant species cause meningitis and gonorrhea in humans.

Agrobacterium tumefaciens can form root nodules in plants and can mate with bacteria,which makes it an excellent host organism for genetic transformations among different domains of life.

Which feature(s)differentiate(s)Actinobacteria from Firmicutes?

Members of the ________ genus are the MOST abundant bacteria present in the large intestine of humans and contain the unusual ________ in their cell membranes.

Deinococcus radiodurans is capable of withstanding especially high levels of radiation,and the carotenoids they produce enhance this resistance.

Which relationship is MOST likely to be observed between species of different classes?

Microorganisms and Microbiology

Microbial Cell Structure and Function

Microbial Metabolism

Molecular Biology

Microbial Growth and Control

Microbial Genomics

Metabolic Regulation

Viruses and Virology

Viral Genomes and Diversity

Genetics of Bacteria and Archaea

Genetic Engineering and Biotechnology

Microbial Evolution and Systematics

Metabolic Diversity of Microorganisms

Functional Diversity of Bacteria

Diversity of Archaea

Diversity of Eukaryotic Microorganisms

Methods in Microbial Ecology

Microbial Ecosystems

Nutrient Cycles

Microbiology of the Built Environment

Microbial Symbioses

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology

Epidemiology

Person-To-Person Bacterial and Viral Diseases

Vectorborne and Soilborne Bacterial and Viral Diseases

Water and Food As Vehicles of Bacterial Diseases

Eukaryotic Pathogens: Fungal and Parasitic Diseases

Filters

Snapping division is a hallmark trait of which can be visualized under a microscope by .

Members of the genus are the MOST abundant bacteria present in the large intestine of humans and contain the unusual in their cell membranes.