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WGU D311 Microbiology 2024 study for
OA Questions and Correct Answers/
Latest Update / Already Graded
What is a characteristic of rhizospheres?
Ans: The rhizosphere is where plants release organic compounds that can
be metabolized by microbes into soil.
Which environment would contain microbes that are psychrophilic?
Ans: Glaciers
What is the role of nematodes in soil?
Ans: They photosynthesize and fix nitrogen.
Which eukaryote is responsible for producing antibiotics to ward off
bacterial competitors?
Ans: Fungi
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Which symbiotic relationship is an example of mutualism?
Ans: The relationship between humans and the Escherichia coli colonizing
the human gut
Which type of symbiotic relationship exists between the Escherichia
coli (E. coli) that inhabit the human gut and the humans who utilize
the vitamin K produced by E. coli?
Ans: Mutualism
Which description of resident microbiota is true?
Ans: Resident microbiota constantly live on the human body.
Which relationship is exhibited by intestinal Escherichia coli and their
human host?
Ans: Mutualism
Which type of disease is transmitted from animals to humans?
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Ans: Zoonotic diseases
Which type of disease is acquired in hospital settings?
Ans: Nosocomial diseases
Which portal of exit can expel the most viral particles?
Ans: Respiratory
Which type of disease is sickle cell anemia?
Ans: Noninfectious
Which type of transmission occurs when tuberculosis is spread
through small particles expelled by a cough?
Ans: Droplet transmission
Which type of transmission occurs when pathogens are spread from
mother to child during breastfeeding?
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Ans: Vertical direct contact transmission
Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body?
Ans: Biological vector transmission
Which type of transmission occurs through contact with a fomite?
Ans: Indirect contact transmission
Which infected host would be considered a passive carrier?
Ans: A healthcare professional who does not wash their hands after
seeing an infected patient
How is Giardia lamblia, the causative agent of giardiasis,
transmitted?
Ans: Contaminated food or water
WGU D311 Microbiology 2024 study for
OA Questions and Correct Answers/
Latest Update / Already Graded
What is a characteristic of rhizospheres?
Ans: The rhizosphere is where plants release organic compounds that can
be metabolized by microbes into soil.
Which environment would contain microbes that are psychrophilic?
Ans: Glaciers
What is the role of nematodes in soil?
Ans: They photosynthesize and fix nitrogen.
Which eukaryote is responsible for producing antibiotics to ward off
bacterial competitors?
Ans: Fungi
,2 | Page
Which symbiotic relationship is an example of mutualism?
Ans: The relationship between humans and the Escherichia coli colonizing
the human gut
Which type of symbiotic relationship exists between the Escherichia
coli (E. coli) that inhabit the human gut and the humans who utilize
the vitamin K produced by E. coli?
Ans: Mutualism
Which description of resident microbiota is true?
Ans: Resident microbiota constantly live on the human body.
Which relationship is exhibited by intestinal Escherichia coli and their
human host?
Ans: Mutualism
Which type of disease is transmitted from animals to humans?
,3 | Page
Ans: Zoonotic diseases
Which type of disease is acquired in hospital settings?
Ans: Nosocomial diseases
Which portal of exit can expel the most viral particles?
Ans: Respiratory
Which type of disease is sickle cell anemia?
Ans: Noninfectious
Which type of transmission occurs when tuberculosis is spread
through small particles expelled by a cough?
Ans: Droplet transmission
Which type of transmission occurs when pathogens are spread from
mother to child during breastfeeding?
, 4 | Page
Ans: Vertical direct contact transmission
Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body?
Ans: Biological vector transmission
Which type of transmission occurs through contact with a fomite?
Ans: Indirect contact transmission
Which infected host would be considered a passive carrier?
Ans: A healthcare professional who does not wash their hands after
seeing an infected patient
How is Giardia lamblia, the causative agent of giardiasis,
transmitted?
Ans: Contaminated food or water
