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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
Which symbiotic relationship is an example of mutualism?
Ans: The relationship between humans and the Escherichia coli
colonizing the human gut
All rights reserved © 2025/ 2026 |
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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?
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?
All rights reserved © 2025/ 2026 |
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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?
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
All rights reserved © 2025/ 2026 |
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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
Which organism is the definitive host of Toxoplasma gondii?
Ans: Birds
Which disease is transmitted by animals but not arthropods?
Ans: Rabies
How can adhesins be described?
Ans: Adhesins found on the surface of pathogens bind to
receptors of host cells.
Which description indicates a portal of entry?
Ans: Body features through which pathogens can enter host
tissue
All rights reserved © 2025/ 2026 |
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
Which symbiotic relationship is an example of mutualism?
Ans: The relationship between humans and the Escherichia coli
colonizing the human gut
All rights reserved © 2025/ 2026 |
, Page |2
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?
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?
All rights reserved © 2025/ 2026 |
, Page |3
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?
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
All rights reserved © 2025/ 2026 |
, Page |4
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
Which organism is the definitive host of Toxoplasma gondii?
Ans: Birds
Which disease is transmitted by animals but not arthropods?
Ans: Rabies
How can adhesins be described?
Ans: Adhesins found on the surface of pathogens bind to
receptors of host cells.
Which description indicates a portal of entry?
Ans: Body features through which pathogens can enter host
tissue
All rights reserved © 2025/ 2026 |
