D311: Microbiology WGU OA
1. What is the significance of microorganisms Microorganisms containing a thick coat of
containing a thick coat of peptidoglycan peptidoglycan within the cell wall are typi-
within the cell wall? cally classified as gram-positive bacteria.
2. Why are viruses considered aceilular? They cannot reproduce without a host.
3. What is the defining characteristic of eu- They have a nucleus.
karyotes?
4. Which microorganism can cause vaginal Fungi
yeast Infections and oral thrush?
5. Why can It be difficult to determine the Some signs and symptoms can be caused by
etiologic agent of a disease? many different etiologic agents.
6. What kind of staining technique Is the Differential Stain
acid-fast stain?
7. A doctor prescribed antibiotics for a pa- The doctor likely suspected a bacterial in-
tient complaining of runny nose. fever. and fection because antibiotics are not effective
aches and pains. Which type of infection against viral infections.
did the doctor suspect?
8. A healthcare professional is treating a pa- Antifungals
tient who developed a yeast infection after
taking antibiotics. What type of medication
should be prescribed to this patient?
9. Which structure promotes motility in Pro- Presence of flagella
teus. Shigelia. and Salmonella species. all
of which can cause serious disease in hu-
mans?
10. Capsule production
, D311: Microbiology WGU OA
Which bacterial virulence factor allows a
strain to resist phagocytosis, increasing
the organism's virulence?
11. Why is treating Haemophilus influenzae dif- The capsule is antiphagocytic.
ficult?
12. How do pili aid pathogens in causing dis- They cause pathogens to adhere to host
ease? cells.
13. Which virulence factor allows pathogens to Bacterial enzymes
penetrate the dermis and invade the body?
14. A bacterium from a deep-sea hydrother- Gram staining
mal vent has been cultured. Which stain-
ing technique should be used to begin the
process of species identification?
15. What does the presence of a clear area The cell has a capsule.
around a cell stained with India ink indicate
about the cell?
16. How do basic stains work? The positively charged stain is attracted to
the negatively charged portion of the cell.
17. Which staining technique is used to distin- Endospore stain
guish bacteria based on their ability to pro-
duce structures that can survive extreme
heat stress?
18. Which aspect of a staining protocol en- Heat
ables dye to penetrate an endospore?
19.
1. What is the significance of microorganisms Microorganisms containing a thick coat of
containing a thick coat of peptidoglycan peptidoglycan within the cell wall are typi-
within the cell wall? cally classified as gram-positive bacteria.
2. Why are viruses considered aceilular? They cannot reproduce without a host.
3. What is the defining characteristic of eu- They have a nucleus.
karyotes?
4. Which microorganism can cause vaginal Fungi
yeast Infections and oral thrush?
5. Why can It be difficult to determine the Some signs and symptoms can be caused by
etiologic agent of a disease? many different etiologic agents.
6. What kind of staining technique Is the Differential Stain
acid-fast stain?
7. A doctor prescribed antibiotics for a pa- The doctor likely suspected a bacterial in-
tient complaining of runny nose. fever. and fection because antibiotics are not effective
aches and pains. Which type of infection against viral infections.
did the doctor suspect?
8. A healthcare professional is treating a pa- Antifungals
tient who developed a yeast infection after
taking antibiotics. What type of medication
should be prescribed to this patient?
9. Which structure promotes motility in Pro- Presence of flagella
teus. Shigelia. and Salmonella species. all
of which can cause serious disease in hu-
mans?
10. Capsule production
, D311: Microbiology WGU OA
Which bacterial virulence factor allows a
strain to resist phagocytosis, increasing
the organism's virulence?
11. Why is treating Haemophilus influenzae dif- The capsule is antiphagocytic.
ficult?
12. How do pili aid pathogens in causing dis- They cause pathogens to adhere to host
ease? cells.
13. Which virulence factor allows pathogens to Bacterial enzymes
penetrate the dermis and invade the body?
14. A bacterium from a deep-sea hydrother- Gram staining
mal vent has been cultured. Which stain-
ing technique should be used to begin the
process of species identification?
15. What does the presence of a clear area The cell has a capsule.
around a cell stained with India ink indicate
about the cell?
16. How do basic stains work? The positively charged stain is attracted to
the negatively charged portion of the cell.
17. Which staining technique is used to distin- Endospore stain
guish bacteria based on their ability to pro-
duce structures that can survive extreme
heat stress?
18. Which aspect of a staining protocol en- Heat
ables dye to penetrate an endospore?
19.
