WGU OA D311 Microbiology
COMPREHENSIVE Exam 2025–2026 Actual
Exam Questions and Verified CORRECT
ANSWERS
Which aspect of a staining protocol enables dye to penetrate an endospore?
- ANSWER>>>Heat
Why are the relationships between pathogenic microbes and their hosts
considered parasitic? - ANSWER>>>The microbe benefits from the interaction
while the host is harmed.
Which characteristic of dracunculiasis has been pivotal to the success of its
eradication campaign? - ANSWER>>>Dracunculiasis has no animal reservoir.
Which type of organism would be most likely to grow on food stored in a
refrigerator or freezer? - ANSWER>>>A psychrophile would be most likely to
grow on food stored in a refrigerator or freezer as these microorganisms
thrive in cold temperatures.
Staphylococcus epidermidis is a member of the human resident microbiota
and considered part of the human innate immune system. S. epidermidis
uses our dead skin cells as a source of nutrients. What type of relationship
, between S. epidermidis and humans is described above? - ANSWER>>>The
type of relationship between Staphylococcus epidermidis and humans
described above is "Commensalism," where one organism (S. epidermidis)
benefits (uses dead skin cells) without harming the other organism (humans).
Commensalism
Why is the production of lactic acid by the resident microbe Lactobacillus
Important to human health? - ANSWER>>>Lactic acid is important to human
health because it inhibits the growth of pathogenic yeasts.
Which type of infections are prevented by proper sterilization of hospital
equipment and healthcare worker handwashing? - ANSWER>>>Nosocomial
infections are prevented by proper sterilization of hospital equipment and
healthcare worker handwashing.
A patient Is determined to have contracted Lyme disease after being bit by
an infected tick. What type of transmission is described in this scenario? -
ANSWER>>>Vector transmission is described in this scenario.
Which is a description of vehicle transmission? - ANSWER>>>A person drinks
untreated water on vacation and later has diarrhea and nausea is a
description of vehicle transmission.
COMPREHENSIVE Exam 2025–2026 Actual
Exam Questions and Verified CORRECT
ANSWERS
Which aspect of a staining protocol enables dye to penetrate an endospore?
- ANSWER>>>Heat
Why are the relationships between pathogenic microbes and their hosts
considered parasitic? - ANSWER>>>The microbe benefits from the interaction
while the host is harmed.
Which characteristic of dracunculiasis has been pivotal to the success of its
eradication campaign? - ANSWER>>>Dracunculiasis has no animal reservoir.
Which type of organism would be most likely to grow on food stored in a
refrigerator or freezer? - ANSWER>>>A psychrophile would be most likely to
grow on food stored in a refrigerator or freezer as these microorganisms
thrive in cold temperatures.
Staphylococcus epidermidis is a member of the human resident microbiota
and considered part of the human innate immune system. S. epidermidis
uses our dead skin cells as a source of nutrients. What type of relationship
, between S. epidermidis and humans is described above? - ANSWER>>>The
type of relationship between Staphylococcus epidermidis and humans
described above is "Commensalism," where one organism (S. epidermidis)
benefits (uses dead skin cells) without harming the other organism (humans).
Commensalism
Why is the production of lactic acid by the resident microbe Lactobacillus
Important to human health? - ANSWER>>>Lactic acid is important to human
health because it inhibits the growth of pathogenic yeasts.
Which type of infections are prevented by proper sterilization of hospital
equipment and healthcare worker handwashing? - ANSWER>>>Nosocomial
infections are prevented by proper sterilization of hospital equipment and
healthcare worker handwashing.
A patient Is determined to have contracted Lyme disease after being bit by
an infected tick. What type of transmission is described in this scenario? -
ANSWER>>>Vector transmission is described in this scenario.
Which is a description of vehicle transmission? - ANSWER>>>A person drinks
untreated water on vacation and later has diarrhea and nausea is a
description of vehicle transmission.
