WGU D311 Microbiology
OBJECTIVE ASSESSMENT
ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
WITH RATIONALES || 100%
GUARANTEED PASS <RECENT
VERSION>
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.
Why are viruses considered aceilular? - ANSWER They
cannot reproduce without a host.
What is the defining characteristic of eukaryotes? -
ANSWER They have a nucleus.
Which microorganism can cause vaginal yeast
Infections and oral thrush? - ANSWER Fungi
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.
What kind of staining technique Is the acid-fast stain? -
ANSWER
, 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.
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
Which structure promotes motility in Proteus. Shigelia.
and Salmonella species. all of which can cause serious
disease in humans? - ANSWER Presence of flagella
Which bacterial virulence factor allows a strain to resist
phagocytosis, increasing the organism's virulence? -
ANSWER Capsule production
Why is treating Haemophilus influenzae difficult? -
ANSWER The capsule is antiphagocytic.
How do pili aid pathogens in causing disease? -
ANSWER They cause pathogens to adhere to host cells.
Which virulence factor allows pathogens to penetrate the
dermis and invade the body? - ANSWER Bacterial
enzymes
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
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.
How do basic stains work? - ANSWER The positively
charged stain is attracted to the negatively charged
portion of the cell.
Which staining technique is used to distinguish bacteria
based on their ability to produce structures that can
survive extreme heat stress? - ANSWER Endospore stain
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.
OBJECTIVE ASSESSMENT
ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS
WITH RATIONALES || 100%
GUARANTEED PASS <RECENT
VERSION>
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.
Why are viruses considered aceilular? - ANSWER They
cannot reproduce without a host.
What is the defining characteristic of eukaryotes? -
ANSWER They have a nucleus.
Which microorganism can cause vaginal yeast
Infections and oral thrush? - ANSWER Fungi
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.
What kind of staining technique Is the acid-fast stain? -
ANSWER
, 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.
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
Which structure promotes motility in Proteus. Shigelia.
and Salmonella species. all of which can cause serious
disease in humans? - ANSWER Presence of flagella
Which bacterial virulence factor allows a strain to resist
phagocytosis, increasing the organism's virulence? -
ANSWER Capsule production
Why is treating Haemophilus influenzae difficult? -
ANSWER The capsule is antiphagocytic.
How do pili aid pathogens in causing disease? -
ANSWER They cause pathogens to adhere to host cells.
Which virulence factor allows pathogens to penetrate the
dermis and invade the body? - ANSWER Bacterial
enzymes
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
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.
How do basic stains work? - ANSWER The positively
charged stain is attracted to the negatively charged
portion of the cell.
Which staining technique is used to distinguish bacteria
based on their ability to produce structures that can
survive extreme heat stress? - ANSWER Endospore stain
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.
