WGU D311: Microbiology WGU OA-
Questions with CORRECT
Answers 100% PASS
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.
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.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Brittie Donald
Questions with CORRECT
Answers 100% PASS
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.
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.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law, Copyrighted By Brittie Donald
