WGU D311 OA FINAL EXAM ACTUAL
VERSION 2 / WGU D311 MICROBIOLOGY
OBJECTIVE ASSESSMENT TEST EXAM
COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS 100%
GRADED A+
What is the role of nematodes in soil? - They photosynthesize and fix nitrogen.
Which eukaryote is responsible for producing antibiotics to ward off bacterial
competitors? – Fungi
What is a characteristic of rhizospheres? - The rhizosphere is where plants release
organic compounds that can be metabolized by microbes into soil.
Which environment would contain microbes that are psychrophilic? - Glaciers
,Which symbiotic relationship is an example of mutualism? - 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? -
Mutualism
Which description of resident microbiota is true? - Resident microbiota constantly live on
the human body.
Which relationship is exhibited by intestinal Escherichia coli and their human host? -
Mutualism
Which type of disease is transmitted from animals to humans? - Zoonotic diseases
Which type of disease is acquired in hospital settings? - Nosocomial diseases
Which portal of exit can expel the most viral particles? - Respiratory
Which type of disease is sickle cell anemia? - Noninfectious
Which type of transmission occurs when tuberculosis is spread through small particles
expelled by a cough? - Droplet transmission
Which type of transmission occurs when pathogens are spread from mother to child
during breastfeeding? - Vertical direct contact transmission
Which type of transmission occurs when an arthropod carries a viral pathogen inside of
its body? - Biological vector transmission
Which type of transmission occurs through contact with a fomite? - Indirect contact
transmission
Which infected host would be considered a passive carrier? - A healthcare professional
who does not wash their hands after seeing an infected patient
How is Giardia lamblia, the causative agent of giardiasis, transmitted? - Contaminated
food or water
Which organism is the definitive host of Toxoplasma gondii? - Birds
Which disease is transmitted by animals but not arthropods? - Rabies
, How can adhesins be described? - Adhesins found on the surface of pathogens bind to
receptors of host cells.
Which description indicates a portal of entry? - 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? - It prevents the
exposure of pathogens to lethal digestive enzymes.
Which action refers to a secondary infection? - An infection by one pathogen enables
another pathogen to cause an infection.
What differentiates signs from symptoms of disease? - Signs are measurable;
symptoms are subjective.
Which procedure does a clinician use to measure a symptom? - Asking patients to rate
pain on a numerical scale
During which stage of an infection does a patient feel the worst? - The period of illness
stage
What defines the end of the incubation period for an infectious disease? - The
appearance of nonspecific signs or symptoms of disease
How does the epidermis help prevent infection and disease? - It provides a harsh
environment for most pathogens and periodically sheds
How does the complement system contribute to the innate immune response? - 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? - AMPs
are produced both routinely and as a response to pathogens.
Which terms refer to monocytes when they differentiate into tissue-specific phagocytes?
- 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? - Incidence
What is the difference between prevalence and incidence? - Prevalence refers to the
total number of infections; incidence refers only to new cases.
VERSION 2 / WGU D311 MICROBIOLOGY
OBJECTIVE ASSESSMENT TEST EXAM
COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS 100%
GRADED A+
What is the role of nematodes in soil? - They photosynthesize and fix nitrogen.
Which eukaryote is responsible for producing antibiotics to ward off bacterial
competitors? – Fungi
What is a characteristic of rhizospheres? - The rhizosphere is where plants release
organic compounds that can be metabolized by microbes into soil.
Which environment would contain microbes that are psychrophilic? - Glaciers
,Which symbiotic relationship is an example of mutualism? - 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? -
Mutualism
Which description of resident microbiota is true? - Resident microbiota constantly live on
the human body.
Which relationship is exhibited by intestinal Escherichia coli and their human host? -
Mutualism
Which type of disease is transmitted from animals to humans? - Zoonotic diseases
Which type of disease is acquired in hospital settings? - Nosocomial diseases
Which portal of exit can expel the most viral particles? - Respiratory
Which type of disease is sickle cell anemia? - Noninfectious
Which type of transmission occurs when tuberculosis is spread through small particles
expelled by a cough? - Droplet transmission
Which type of transmission occurs when pathogens are spread from mother to child
during breastfeeding? - Vertical direct contact transmission
Which type of transmission occurs when an arthropod carries a viral pathogen inside of
its body? - Biological vector transmission
Which type of transmission occurs through contact with a fomite? - Indirect contact
transmission
Which infected host would be considered a passive carrier? - A healthcare professional
who does not wash their hands after seeing an infected patient
How is Giardia lamblia, the causative agent of giardiasis, transmitted? - Contaminated
food or water
Which organism is the definitive host of Toxoplasma gondii? - Birds
Which disease is transmitted by animals but not arthropods? - Rabies
, How can adhesins be described? - Adhesins found on the surface of pathogens bind to
receptors of host cells.
Which description indicates a portal of entry? - 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? - It prevents the
exposure of pathogens to lethal digestive enzymes.
Which action refers to a secondary infection? - An infection by one pathogen enables
another pathogen to cause an infection.
What differentiates signs from symptoms of disease? - Signs are measurable;
symptoms are subjective.
Which procedure does a clinician use to measure a symptom? - Asking patients to rate
pain on a numerical scale
During which stage of an infection does a patient feel the worst? - The period of illness
stage
What defines the end of the incubation period for an infectious disease? - The
appearance of nonspecific signs or symptoms of disease
How does the epidermis help prevent infection and disease? - It provides a harsh
environment for most pathogens and periodically sheds
How does the complement system contribute to the innate immune response? - 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? - AMPs
are produced both routinely and as a response to pathogens.
Which terms refer to monocytes when they differentiate into tissue-specific phagocytes?
- 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? - Incidence
What is the difference between prevalence and incidence? - Prevalence refers to the
total number of infections; incidence refers only to new cases.
