MICROBIOLOGY WGU OA COMPREHENSIVE STUDY GUIDE
LATEST GUIDE 2026 GRADED A+
What is the significance of microorganisms containing a thick coat of peptldogiywn within the
cell wall? - Microorganisms containing a thick coat of peptidoglycan within the cell wall are
typically classified as gram-positive bacteria.
Why are viruses considered aceilular? - They cannot reproduce without a host.
What is the defining characteristic of eukaryotes? - They have a nucleus.
Which microorganism can cause vaginal yeast Infections and oral thrush? - Fungi
Why can It be difficult to determine the etiologic agent of a disease? - Some signs and
symptoms can be caused by many different etiologic agents.
What kind of staining technique Is the acid-fast stain? -
A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and aches and
pains. Which type of infection did the doctor suspect? - 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? - Antifungals
Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of which can
cause serious disease in humans? - Presence of flagella
, Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the organism's
virulence? - Capsule production
Why is treating Haemophilus influenzae difficult? - The capsule is antiphagocytic.
How do pili aid pathogens in causing disease? - They cause pathogens to adhere to host cells.
Which virulence factor allows pathogens to penetrate the dermis and invade the body? -
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? - Gram staining
What does the presence of a clear area around a cell stained with India ink indicate about the
cell? - The cell has a capsule.
How do basic stains work? - 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? - Endospore stain
Which aspect of a staining protocol enables dye to penetrate an endospore? - Heat
Why are the relationships between pathogenic microbes and their hosts considered parasitic? -
The microbe benefits from the interaction while the host is harmed.
LATEST GUIDE 2026 GRADED A+
What is the significance of microorganisms containing a thick coat of peptldogiywn within the
cell wall? - Microorganisms containing a thick coat of peptidoglycan within the cell wall are
typically classified as gram-positive bacteria.
Why are viruses considered aceilular? - They cannot reproduce without a host.
What is the defining characteristic of eukaryotes? - They have a nucleus.
Which microorganism can cause vaginal yeast Infections and oral thrush? - Fungi
Why can It be difficult to determine the etiologic agent of a disease? - Some signs and
symptoms can be caused by many different etiologic agents.
What kind of staining technique Is the acid-fast stain? -
A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and aches and
pains. Which type of infection did the doctor suspect? - 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? - Antifungals
Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of which can
cause serious disease in humans? - Presence of flagella
, Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the organism's
virulence? - Capsule production
Why is treating Haemophilus influenzae difficult? - The capsule is antiphagocytic.
How do pili aid pathogens in causing disease? - They cause pathogens to adhere to host cells.
Which virulence factor allows pathogens to penetrate the dermis and invade the body? -
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? - Gram staining
What does the presence of a clear area around a cell stained with India ink indicate about the
cell? - The cell has a capsule.
How do basic stains work? - 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? - Endospore stain
Which aspect of a staining protocol enables dye to penetrate an endospore? - Heat
Why are the relationships between pathogenic microbes and their hosts considered parasitic? -
The microbe benefits from the interaction while the host is harmed.
