D311: Microbiology WGU OA Questions and Correct Answers/ Latest Update / Already Graded

What is the significance of microorganisms containing a thick coat of peptldogiywn within the cell wall? Ans: Microorganisms containing a thick coat of peptidoglycan within the cell wall are typically classified as gram-positive bacteria. Why are viruses considered aceilular? Ans: They cannot reproduce without a host. What is the defining characteristic of eukaryotes? Ans: They have a nucleus. Which microorganism can cause vaginal yeast Infections and oral thrush? Ans: Fungi Why can It be difficult to determine the etiologic agent of a disease? All rights reserved © 2025/ 2026 | Page | 2 Ans: Some signs and symptoms can be caused by many different etiologic agents. What kind of staining technique Is the acid-fast stain? Ans: A doctor prescribed antibiotics for a patient complaining of runny nose. fever. and aches and pains. Which type of infection did the doctor suspect? Ans: 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? Ans: Antifungals Which structure promotes motility in Proteus. Shigelia. and Salmonella species. all of which can cause serious disease in humans? Ans: Presence of flagella All rights reserved © 2025/ 2026 | Page | 3 Which bacterial virulence factor allows a strain to resist phagocytosis, increasing the organism's virulence? Ans: Capsule production Why is treating Haemophilus influenzae difficult? Ans: The capsule is antiphagocytic. How do pili aid pathogens in causing disease? Ans: They cause pathogens to adhere to host cells. Which virulence factor allows pathogens to penetrate the dermis and invade the body? Ans: Bacterial enzymes