D311 WGU Microbiology with Lab: PA Questions with Verified
Answers (Correct Update)
Question 1: Which class of cells most often
contain extrachromosomal DNA
found in plasmids?
Answer: Prokaryotic
Question 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.
Question 3: Which microorganisms produce
dermatophytes that can cause skin
infections, such as athlete's foot and
ringworm?
Answer: Fungi
Question 4: Which microorganisms can produce
human pathogens that spread via
microsporidia?
Answer: Fungi
Question 5: Why are archaea considered
prokaryotic organisms?
Answer: Their cells do not contain a nucleus.
Question 6: Why is MRSA more pathogenic than
other strains of Staphylococcus
aureus?
Answer: MRSA has increased antibiotic resistance.
Page 1
, Question 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
Question 8: Which viral virulence factor requires
adjustments to the influenza vaccine
annually?
Answer: Antigenic variation
Question 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
Question 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.
Question 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: Endospore staining
Page 2
Answers (Correct Update)
Question 1: Which class of cells most often
contain extrachromosomal DNA
found in plasmids?
Answer: Prokaryotic
Question 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.
Question 3: Which microorganisms produce
dermatophytes that can cause skin
infections, such as athlete's foot and
ringworm?
Answer: Fungi
Question 4: Which microorganisms can produce
human pathogens that spread via
microsporidia?
Answer: Fungi
Question 5: Why are archaea considered
prokaryotic organisms?
Answer: Their cells do not contain a nucleus.
Question 6: Why is MRSA more pathogenic than
other strains of Staphylococcus
aureus?
Answer: MRSA has increased antibiotic resistance.
Page 1
, Question 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
Question 8: Which viral virulence factor requires
adjustments to the influenza vaccine
annually?
Answer: Antigenic variation
Question 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
Question 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.
Question 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: Endospore staining
Page 2
