D311: Microbiology WGU OA Question and
Answer (2026/2027) | Real Recently Tested
Questions | A+ Verified
• 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
Answer (2026/2027) | Real Recently Tested
Questions | A+ Verified
• 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
