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WGU D311 Microbiology 2024 Study For OA : Questions With Correct Solutions
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WGU D311 Microbiology 2024 Study For OA : Questions With Correct Solutions
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WGU D311 Microbiology 2024 Study For OA : QuestionsWith Correct Solutions
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 photosynthesize
and fix nitrogen.
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 live 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 -
Birds
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.
, Which action refers to a secondary infection? Right Ans - An infection by
one pathogen enables another pathogen to cause an infection.
What differentiates signs from symptoms of disease? Right Ans - Signs are
measurable; symptoms are subjective.
Which procedure does a clinician use to measure a symptom? Right Ans -
Asking patients to rate pain on a numerical scale
During which stage of an infection does a patient feel the worst? Right Ans
- The period of illness stage
What defines the end of the incubation period for an infectious disease?
Right Ans - The appearance of nonspecific signs or symptoms of disease
How does the epidermis help prevent infection and disease? Right Ans - It
provides a harsh environment for most pathogens and periodically sheds
How does the complement system contribute to the innate immune response?
Right Ans - It is composed of proteins that can be activated by the presence of
pathogens to form the membrane attack complex (MAC).
Why are antimicrobial peptides (AMPs) considered an innate immune
function? Right Ans - AMPs are produced both routinely and as a response
to pathogens.
Which terms refer to monocytes when they differentiate into tissue-specific
phagocytes? Right Ans - Macrophages and dendritic cells
What is specifically being reported if the Centers for Disease Control and
Prevention reports 10,000 new cases of COVID-19? Right Ans - Incidence
What is the difference between prevalence and incidence? Right Ans -
Prevalence refers to the total number of infections; incidence refers only to
new cases.
Which term refers to a disease that occurs on a worldwide scale at a given
time? Right Ans - Pandemic
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