WGU D311 MICROBIOLOGY OA
LATEST EXAM THIS YEAR WITH
DETAILED QUESTIONS AND
VERIFIED CORRECT ANSWERS FOR
GUARANTEED PASS
Question-Which microorganism can cause vaginal yeast Infections and oral thrush? - Answer-
Fungi
Question-Why can It be difficult to determine the etiologic agent of a disease? - Answer-Some
signs and symptoms can be caused by many different etiologic agents.
Question-What is the significance of microorganisms containing a thick coat of peptldogiywn
within the cell wall? - Answer-Microorganisms containing a thick coat of peptidoglycan within
the cell wall are typically classified as gram-positive bacteria.
Question-Why are viruses considered aceilular? - Answer-They cannot reproduce without a host.
Question-What is the defining characteristic of eukaryotes? - Answer-They have a nucleus.
Question-A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and
aches and pains. Which type of infection did the doctor suspect? - Answer-The doctor likely
suspected a viral infection because antibiotics are not effective against viral infections.
,Question-A healthcare professional is treating a patient who developed a yeast infection after
taking antibiotics. What type of medication should be prescribed to this patient? - Answer-
Antifungals
Question-Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of
which can cause serious disease in humans? - Answer-Presence of flagella
Question-Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the
organism's virulence? - Answer-Capsule production
Question-Why is treating Haemophilus influenzae difficult? - Answer-The capsule is
antiphagocytic.
Question-How do pili aid pathogens in causing disease? - Answer-They cause pathogens to
adhere to host cells.
Question-Which virulence factor allows pathogens to penetrate the dermis and invade the body?
- Answer-Bacterial enzymes
Question-A bacterium from a deep-sea hydrothermal vent has been cultured. Which staining
technique should be used to begin the process of species identification? - Answer-Gram staining
Question-What does the presence of a clear area around a cell stained with India ink indicate
about the cell? - Answer-The cell has a capsule.
,Question-How do basic stains work? - Answer-The positively charged stain is attracted to the
negatively charged portion of the cell.
Question-Which staining technique is used to distinguish bacteria based on their ability to
produce structures that can survive extreme heat stress? - Answer-Endospore stain
Question-Which aspect of a staining protocol enables dye to penetrate an endospore? - Answer-
Heat
Question-Why are the relationships between pathogenic microbes and their hosts considered
parasitic? - Answer-The microbe benefits from the interaction while the host is harmed.
Question-Which characteristic of dracunculiasis has been pivotal to the success of its eradication
campaign? - Answer-Dracunculiasis has no animal reservoir.
Question-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.
Question-Staphylococcus epidermldls is a member of the human resident microbiota and
considered part of the human innate immune system. S. epldermidis 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
Question-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.
Question-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.
Question-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.
Question-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.
Question-Which organism type contains species that perform adhesion through the unique use of
its flagella to move out fluid from under a large adhesive disc, resulting in lower pressure to
adhere to the intestinal lining? - Answer-Protozoa
Question-A patient presents to the emergency department with high fever. difficulty breathing.
vomiting, coughing up blood. and severe chest pain when inhaling. Which pathogen would the
provider suspect? - Answer-Bacillus anthracis
LATEST EXAM THIS YEAR WITH
DETAILED QUESTIONS AND
VERIFIED CORRECT ANSWERS FOR
GUARANTEED PASS
Question-Which microorganism can cause vaginal yeast Infections and oral thrush? - Answer-
Fungi
Question-Why can It be difficult to determine the etiologic agent of a disease? - Answer-Some
signs and symptoms can be caused by many different etiologic agents.
Question-What is the significance of microorganisms containing a thick coat of peptldogiywn
within the cell wall? - Answer-Microorganisms containing a thick coat of peptidoglycan within
the cell wall are typically classified as gram-positive bacteria.
Question-Why are viruses considered aceilular? - Answer-They cannot reproduce without a host.
Question-What is the defining characteristic of eukaryotes? - Answer-They have a nucleus.
Question-A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and
aches and pains. Which type of infection did the doctor suspect? - Answer-The doctor likely
suspected a viral infection because antibiotics are not effective against viral infections.
,Question-A healthcare professional is treating a patient who developed a yeast infection after
taking antibiotics. What type of medication should be prescribed to this patient? - Answer-
Antifungals
Question-Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of
which can cause serious disease in humans? - Answer-Presence of flagella
Question-Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the
organism's virulence? - Answer-Capsule production
Question-Why is treating Haemophilus influenzae difficult? - Answer-The capsule is
antiphagocytic.
Question-How do pili aid pathogens in causing disease? - Answer-They cause pathogens to
adhere to host cells.
Question-Which virulence factor allows pathogens to penetrate the dermis and invade the body?
- Answer-Bacterial enzymes
Question-A bacterium from a deep-sea hydrothermal vent has been cultured. Which staining
technique should be used to begin the process of species identification? - Answer-Gram staining
Question-What does the presence of a clear area around a cell stained with India ink indicate
about the cell? - Answer-The cell has a capsule.
,Question-How do basic stains work? - Answer-The positively charged stain is attracted to the
negatively charged portion of the cell.
Question-Which staining technique is used to distinguish bacteria based on their ability to
produce structures that can survive extreme heat stress? - Answer-Endospore stain
Question-Which aspect of a staining protocol enables dye to penetrate an endospore? - Answer-
Heat
Question-Why are the relationships between pathogenic microbes and their hosts considered
parasitic? - Answer-The microbe benefits from the interaction while the host is harmed.
Question-Which characteristic of dracunculiasis has been pivotal to the success of its eradication
campaign? - Answer-Dracunculiasis has no animal reservoir.
Question-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.
Question-Staphylococcus epidermldls is a member of the human resident microbiota and
considered part of the human innate immune system. S. epldermidis 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
Question-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.
Question-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.
Question-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.
Question-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.
Question-Which organism type contains species that perform adhesion through the unique use of
its flagella to move out fluid from under a large adhesive disc, resulting in lower pressure to
adhere to the intestinal lining? - Answer-Protozoa
Question-A patient presents to the emergency department with high fever. difficulty breathing.
vomiting, coughing up blood. and severe chest pain when inhaling. Which pathogen would the
provider suspect? - Answer-Bacillus anthracis
