D311: WGU MICROBIOLOGY WITH LAB: PA
Complete Questions and Guide Answers
100% Verified Graded A+
1. Which class of cells most often contain extrachromosomal DNA found in
plasmids?
Answer: Prokaryotic
2. 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.
3. Which microorganisms produce dermatophytes that can cause skin infec-tions,
such as athlete's foot and ringworm?
Answer: Fungi
4. Which microorganisms can produce human pathogens that spread via mi-
crosporidia?
Answer: Fungi
5. Why are archaea considered prokaryotic organisms?
Answer: Their cells do not contain a
nucleus.
, 6. Why is MRSA more pathogenic than other strains of Staphylococcus aureus?-
Answer: MRSA has increased antibiotic resistance.
7. 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
8. Which viral virulence factor requires adjustments to the influenza vaccine annually?
Answer: Antigenic variation
9. 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
10. 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.
11. 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: En-dospore staining
12. A student in a lab has just completed an endospore stain of Bacillus an-thracis
and realized that heat was not applied during the staining technique.
Complete Questions and Guide Answers
100% Verified Graded A+
1. Which class of cells most often contain extrachromosomal DNA found in
plasmids?
Answer: Prokaryotic
2. 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.
3. Which microorganisms produce dermatophytes that can cause skin infec-tions,
such as athlete's foot and ringworm?
Answer: Fungi
4. Which microorganisms can produce human pathogens that spread via mi-
crosporidia?
Answer: Fungi
5. Why are archaea considered prokaryotic organisms?
Answer: Their cells do not contain a
nucleus.
, 6. Why is MRSA more pathogenic than other strains of Staphylococcus aureus?-
Answer: MRSA has increased antibiotic resistance.
7. 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
8. Which viral virulence factor requires adjustments to the influenza vaccine annually?
Answer: Antigenic variation
9. 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
10. 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.
11. 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: En-dospore staining
12. A student in a lab has just completed an endospore stain of Bacillus an-thracis
and realized that heat was not applied during the staining technique.
