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WGU D311 Microbiology Section 2 – Questions & Correct Solutions (100%)
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WGU D311 Microbiology Section 2 – Questions & Correct Solutions (100%)
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WGU D311 Microbiology Section 2 – Questions &Correct Solutions (100%)
What is a characteristic of rhizospheres? Right 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? Right
Ans - Glaciers
What is the role of nematodes in soil? Right Ans - They prey on bacteria,
smaller nematodes, fungi, and even plant roots
Which eukaryote is responsible for producing antibiotics to ward off bacterial
competitors? Right Ans - Fungi
Which symbiotic relationship is an example of mutualism? Right 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? Right Ans - Mutualism
Which description of resident microbiota is true? Right Ans - Resident
microbiota constantly lives on the human body
Which relationship is exhibited by intestinal Escherichia coli and their human
host? Right Ans - Mutualism
Which type of disease is transmitted from animals to humans? Right Ans -
Zoonotic diseases
Which type of disease is acquired in hospital settings? Right Ans -
Nosocomial diseases
Which portal of exit can expel the most viral particles? Right Ans -
Respiratory
, Which type of disease is sickle cell anemia? Right Ans - Noninfectious
Which type of transmission occurs when tuberculosis is spread through small
particles expelled by a cough? Right Ans - Droplet transmission
Which type of transmission occurs when pathogens are spread from mother
to child during breastfeeding? Right Ans - Vertical direct contact
transmission
Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body? Right Ans - Biological vector transmission
Which type of transmission occurs through contact with a fomite? Right
Ans - Indirect contact transmission
Which infected host would be considered a passive carrier? Right 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? Right
Ans - Contaminated food or water
Which organism is the definitive host of Toxoplasma gondii? Right Ans -
Cats
Which disease is transmitted by animals but not arthropods? Right Ans -
Rabies
How can adhesins be described? Right Ans - Adhesins found on the surface
of pathogens bind to receptors of host cells.
Which description indicates a portal of entry? Right Ans - Body features
through which pathogens can enter host tissue
Pathogens produce proteins to prevent the fusion of the phagosome and the
lysosome (phagolysosome). Why does this virulence factor facilitate invasion?
Right Ans - It prevents the exposure of pathogens to lethal digestive enzymes
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