WGU D311 Microbiology Questions
and Answers | Study Guide | Grade
A+
• Why are viruses considered aceilular? CORRECT ANSWER: They cannot
reproduce without a host.
• What is the defining characteristic of eukaryotes? CORRECT ANSWER: They
have a nucleus.
• Which microorganism can cause vaginal yeast Infections and oral thrush?
CORRECT ANSWER: Fungi
• Why can It be difficult to determine the etiologic agent of a disease? CORRECT
ANSWER: Some signs and symptoms can be caused by many different etiologic
agents.
• What kind of staining technique Is the acid-fast stain? CORRECT ANSWER:
• A doctor prescribed antibiotics for a patient complaining of runny nose. fever.
and aches and pains. Which type of infection did the doctor suspect? CORRECT
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? CORRECT ANSWER: Antifungals
, • Which structure promotes motility in Proteus. Shigelia. and Salmonella species.
all of which can cause serious disease in humans? CORRECT ANSWER:
Presence of flagella
• Which bacterial virulence factor allows a strain to resist phagocytosis, increasing
the organism's virulence? CORRECT ANSWER: Capsule production
• Why is treating Haemophilus influenzae difficult? CORRECT ANSWER: The
capsule is antiphagocytic.
• How do pili aid pathogens in causing disease? CORRECT ANSWER: They
cause pathogens to adhere to host cells.
• Which virulence factor allows pathogens to penetrate the dermis and invade the
body? CORRECT 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?
CORRECT ANSWER: Gram staining
• What does the presence of a clear area around a cell stained with India ink
indicate about the cell? CORRECT ANSWER: The cell has a capsule.
• How do basic stains work? CORRECT 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? CORRECT ANSWER:
Endospore stain
and Answers | Study Guide | Grade
A+
• Why are viruses considered aceilular? CORRECT ANSWER: They cannot
reproduce without a host.
• What is the defining characteristic of eukaryotes? CORRECT ANSWER: They
have a nucleus.
• Which microorganism can cause vaginal yeast Infections and oral thrush?
CORRECT ANSWER: Fungi
• Why can It be difficult to determine the etiologic agent of a disease? CORRECT
ANSWER: Some signs and symptoms can be caused by many different etiologic
agents.
• What kind of staining technique Is the acid-fast stain? CORRECT ANSWER:
• A doctor prescribed antibiotics for a patient complaining of runny nose. fever.
and aches and pains. Which type of infection did the doctor suspect? CORRECT
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? CORRECT ANSWER: Antifungals
, • Which structure promotes motility in Proteus. Shigelia. and Salmonella species.
all of which can cause serious disease in humans? CORRECT ANSWER:
Presence of flagella
• Which bacterial virulence factor allows a strain to resist phagocytosis, increasing
the organism's virulence? CORRECT ANSWER: Capsule production
• Why is treating Haemophilus influenzae difficult? CORRECT ANSWER: The
capsule is antiphagocytic.
• How do pili aid pathogens in causing disease? CORRECT ANSWER: They
cause pathogens to adhere to host cells.
• Which virulence factor allows pathogens to penetrate the dermis and invade the
body? CORRECT 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?
CORRECT ANSWER: Gram staining
• What does the presence of a clear area around a cell stained with India ink
indicate about the cell? CORRECT ANSWER: The cell has a capsule.
• How do basic stains work? CORRECT 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? CORRECT ANSWER:
Endospore stain
