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D311: WGU MICROBIOLOGY WITH LAB: PA QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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D311: WGU MICROBIOLOGY WITH LAB: PA QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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D311: WGU MICROBIOLOGY WITH LAB:PA QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
Which class of cells most often contain extrachromosomal DNA found in plasmids? - ANSWER
Prokaryotic
What is the significance of the molecule that makes up the bilayer formed in the plasma membrane of
most bacterial and eukaryotic cells? - ANSWER Phospholipids help maintain hydrophobic and hydrophilic
environments.
Which microorganisms produce dermatophytes that can cause skin infections, such as athlete's foot and
ringworm? - ANSWER Fungi
Which microorganisms can produce human pathogens that spread via microsporidia? - ANSWER Fungi
Why are archaea considered prokaryotic organisms? - ANSWER Their cells do not contain a nucleus.
Why is MRSA more pathogenic than other strains of Staphylococcus aureus? - ANSWER MRSA has
increased antibiotic resistance.
A patient recently had an outpatient surgical procedure. After a few days at home, they noticed swelling
and redness at their incision site. How would this infection be classified? - ANSWER Iatrogenic
Which viral virulence factor requires adjustments to the influenza vaccine annually? - ANSWER Antigenic
variation
Which pair of enzymes are produced by some bacteria that causes the clotting of blood to protect the
bacteria in the bloodstream, then a digestion of the clots to allow the bacteria to spread? - ANSWER
Coagulase and kinase
How does coinfection of a single cell by multiple strains of a virus increase it's pathogenicity? - ANSWER
Coinfection provides the opportunity for an antigenic shift.
, Canned food is heated and sealed in sterile containers to provide a longer shelf life and prevent spoilage.
Improper canning results in the growth of microorganisms, which may result in food containers that
swell and explode.
Which staining technique can be used to identify these microorganisms? - ANSWER Endospore staining
A student in a lab has just completed an endospore stain of Bacillus anthracis and realized that heat was
not applied during the staining technique.
What will the student see upon microscopic examination of the slide? - ANSWER Pink vegetative cells
with clear round areas.
A physician is given a vaginal swab in order to test for post-antibiotic vaginal infection.
Which microscopic technique would identify opportunistic fungal pathogen? - ANSWER Wet mount stain
A technician has just performed a Gram stain but forgot to add the safranin.
What is the likely result of this when viewed microscopically? - ANSWER Gram-negative organisms can
not be seen under the microscope.
Which characteristic of mycobacterium makes a Gram stain unsuitable? - ANSWER The cell wall has a
waxy lipid.
Which feature of infection indicates the presence of a primary pathogen rather than an opportunistic
pathogen? - ANSWER Patients with healthy immune systems.
After oral antibiotic therapy, a patient is diagnosed with vaginitis.
What type of microbe could be causing this opportunistic infection? - ANSWER Fungus
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