D311 MICROBIOLOGY WGU OA
COMPREHENSIVE EXAMINATION 2026
QUESTIONS WITH VERIFIED SOLUTIONS
GRADED A+
⩥ 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.
⩥ What kind of staining technique Is the acid-fast stain? 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? 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
COMPREHENSIVE EXAMINATION 2026
QUESTIONS WITH VERIFIED SOLUTIONS
GRADED A+
⩥ 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.
⩥ What kind of staining technique Is the acid-fast stain? 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? 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
