D311: Microbiology WGU OA study
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What is the significance of microorganisms containing a thick coat of peptldogiywn
within the cell wall? - ANSWERS-Microorganisms containing a thick coat of
peptidoglycan within the cell wall are typically classified as gram-positive bacteria.
Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the
organism's virulence? - ANSWERS-Capsule production
Why is treating Haemophilus influenzae difficult? - ANSWERS-The capsule is
antiphagocytic.
How do pili aid pathogens in causing disease? - ANSWERS-They cause pathogens to
adhere to host cells.
Which virulence factor allows pathogens to penetrate the dermis and invade the body? -
ANSWERS-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? - ANSWERS-
Gram staining
A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and aches
and pains. Which type of infection did the doctor suspect? - ANSWERS-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? -
ANSWERS-Antifungals
Why are viruses considered aceilular? - ANSWERS-They cannot reproduce without a
host.
What is the defining characteristic of eukaryotes? - ANSWERS-They have a nucleus.
Which microorganism can cause vaginal yeast Infections and oral thrush? - ANSWERS-
Fungi
Why can It be difficult to determine the etiologic agent of a disease? - ANSWERS-Some
signs and symptoms can be caused by many different etiologic agents.
Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of
which can cause serious disease in humans? - ANSWERS-Presence of flagella
What does the presence of a clear area around a cell stained with India ink indicate
about the cell? - ANSWERS-The cell has a capsule.
How do basic stains work? - ANSWERS-The positively charged stain is attracted to the
negatively charged portion of the cell.
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What is the significance of microorganisms containing a thick coat of peptldogiywn
within the cell wall? - ANSWERS-Microorganisms containing a thick coat of
peptidoglycan within the cell wall are typically classified as gram-positive bacteria.
Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the
organism's virulence? - ANSWERS-Capsule production
Why is treating Haemophilus influenzae difficult? - ANSWERS-The capsule is
antiphagocytic.
How do pili aid pathogens in causing disease? - ANSWERS-They cause pathogens to
adhere to host cells.
Which virulence factor allows pathogens to penetrate the dermis and invade the body? -
ANSWERS-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? - ANSWERS-
Gram staining
A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and aches
and pains. Which type of infection did the doctor suspect? - ANSWERS-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? -
ANSWERS-Antifungals
Why are viruses considered aceilular? - ANSWERS-They cannot reproduce without a
host.
What is the defining characteristic of eukaryotes? - ANSWERS-They have a nucleus.
Which microorganism can cause vaginal yeast Infections and oral thrush? - ANSWERS-
Fungi
Why can It be difficult to determine the etiologic agent of a disease? - ANSWERS-Some
signs and symptoms can be caused by many different etiologic agents.
Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of
which can cause serious disease in humans? - ANSWERS-Presence of flagella
What does the presence of a clear area around a cell stained with India ink indicate
about the cell? - ANSWERS-The cell has a capsule.
How do basic stains work? - ANSWERS-The positively charged stain is attracted to the
negatively charged portion of the cell.
