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WGU D311 Microbiology TEST FINAL EXAM AND PRACTICE
EXAM 2026/2027 BANK 2 VERSIONS QUESTIONS WITH
DETAILED VERIFIED ANSWERS / EXAM QUESTIONS WILL
COME FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
What is a characteristic of rhizospheres? - ANSWERS--The rhizosphere
is where plants release organic compounds that can be metabolized by
microbes into soil.
Which environment would contain microbes that are psychrophilic? -
ANSWERS--Glaciers
What is the role of nematodes in soil? - ANSWERS--They
photosynthesize and fix nitrogen.
Which eukaryote is responsible for producing antibiotics to ward off
bacterial competitors? - ANSWERS--Fungi
Which symbiotic relationship is an example of mutualism? - ANSWERS--
The relationship between humans and the Escherichia coli colonizing
the human gut
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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? - ANSWERS--Mutualism
Which description of resident microbiota is true? - ANSWERS--Resident
microbiota constantly live on the human body.
Which relationship is exhibited by intestinal Escherichia coli and their
human host? - ANSWERS--Mutualism
Which type of disease is transmitted from animals to humans? -
ANSWERS--Zoonotic diseases
Which type of disease is acquired in hospital settings? - ANSWERS--
Nosocomial diseases
Which portal of exit can expel the most viral particles? - ANSWERS--
Respiratory
Which type of disease is sickle cell anemia? - ANSWERS--Noninfectious
Which type of transmission occurs when tuberculosis is spread through
small particles expelled by a cough? - ANSWERS--Droplet transmission
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Which type of transmission occurs when pathogens are spread from
mother to child during breastfeeding? - ANSWERS--Vertical direct
contact transmission
Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body? - ANSWERS--Biological vector transmission
Which type of transmission occurs through contact with a fomite? -
ANSWERS--Indirect contact transmission
Which infected host would be considered a passive carrier? -
ANSWERS--A healthcare professional who does not wash their hands
after seeing an infected patient
How is Giardia lamblia, the causative agent of giardiasis, transmitted? -
ANSWERS--Contaminated food or water
Which organism is the definitive host of Toxoplasma gondii? -
ANSWERS--Birds
Which disease is transmitted by animals but not arthropods? -
ANSWERS--Rabies
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How can adhesins be described? - ANSWERS--Adhesins found on the
surface of pathogens bind to receptors of host cells.
Which description indicates a portal of entry? - ANSWERS--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? - ANSWERS--It prevents the exposure of pathogens
to lethal digestive enzymes.
Which action refers to a secondary infection? - ANSWERS--An infection
by one pathogen enables another pathogen to cause an infection.
What differentiates signs from symptoms of disease? - ANSWERS--Signs
are measurable; symptoms are subjective.
Which procedure does a clinician use to measure a symptom? -
ANSWERS--Asking patients to rate pain on a numerical scale
During which stage of an infection does a patient feel the worst? -
ANSWERS--The period of illness stage
WGU D311 Microbiology TEST FINAL EXAM AND PRACTICE
EXAM 2026/2027 BANK 2 VERSIONS QUESTIONS WITH
DETAILED VERIFIED ANSWERS / EXAM QUESTIONS WILL
COME FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
What is a characteristic of rhizospheres? - ANSWERS--The rhizosphere
is where plants release organic compounds that can be metabolized by
microbes into soil.
Which environment would contain microbes that are psychrophilic? -
ANSWERS--Glaciers
What is the role of nematodes in soil? - ANSWERS--They
photosynthesize and fix nitrogen.
Which eukaryote is responsible for producing antibiotics to ward off
bacterial competitors? - ANSWERS--Fungi
Which symbiotic relationship is an example of mutualism? - ANSWERS--
The relationship between humans and the Escherichia coli colonizing
the human gut
,2|Page
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? - ANSWERS--Mutualism
Which description of resident microbiota is true? - ANSWERS--Resident
microbiota constantly live on the human body.
Which relationship is exhibited by intestinal Escherichia coli and their
human host? - ANSWERS--Mutualism
Which type of disease is transmitted from animals to humans? -
ANSWERS--Zoonotic diseases
Which type of disease is acquired in hospital settings? - ANSWERS--
Nosocomial diseases
Which portal of exit can expel the most viral particles? - ANSWERS--
Respiratory
Which type of disease is sickle cell anemia? - ANSWERS--Noninfectious
Which type of transmission occurs when tuberculosis is spread through
small particles expelled by a cough? - ANSWERS--Droplet transmission
,3|Page
Which type of transmission occurs when pathogens are spread from
mother to child during breastfeeding? - ANSWERS--Vertical direct
contact transmission
Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body? - ANSWERS--Biological vector transmission
Which type of transmission occurs through contact with a fomite? -
ANSWERS--Indirect contact transmission
Which infected host would be considered a passive carrier? -
ANSWERS--A healthcare professional who does not wash their hands
after seeing an infected patient
How is Giardia lamblia, the causative agent of giardiasis, transmitted? -
ANSWERS--Contaminated food or water
Which organism is the definitive host of Toxoplasma gondii? -
ANSWERS--Birds
Which disease is transmitted by animals but not arthropods? -
ANSWERS--Rabies
, 4|Page
How can adhesins be described? - ANSWERS--Adhesins found on the
surface of pathogens bind to receptors of host cells.
Which description indicates a portal of entry? - ANSWERS--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? - ANSWERS--It prevents the exposure of pathogens
to lethal digestive enzymes.
Which action refers to a secondary infection? - ANSWERS--An infection
by one pathogen enables another pathogen to cause an infection.
What differentiates signs from symptoms of disease? - ANSWERS--Signs
are measurable; symptoms are subjective.
Which procedure does a clinician use to measure a symptom? -
ANSWERS--Asking patients to rate pain on a numerical scale
During which stage of an infection does a patient feel the worst? -
ANSWERS--The period of illness stage
