WGU D311 MICROBIOLOGY 2024 STUDY
FOR OA
1. What is a characteristic of rhizospheres?
Answer The rhizosphere is where plants release organic compounds that can be metabolized by
microbes into soil.
2. Which environment would contain microbes that are psychrophilic?
Answer Glaciers
3. What is the role of nematodes in soil?
Answer They photosynthesize and fix nitrogen.
4. Which eukaryote is responsible for producing antibiotics to ward off bacterial
competitors?
Answer Fungi
5. Which symbiotic relationship is an example of mutualism?
Answer The relationship between humans and the Escherichia coli colonizing the human gut
6. Which type of symbiotic relationship exists between the Escherichia coli (E.
,coli) that inhabit the human gut and the humans who utilize the vitamin K
produced by E. coli?
Answer Mutualism
7. Which description of resident microbiota is true?
Answer Resident microbiota constantly live on the human body.
8. Which relationship is exhibited by intestinal Escherichia coli and their human
host?
Answer Mutualism
9. Which type of disease is transmitted from animals to humans?
Answer Zoonotic diseases
10. Which type of disease is acquired in hospital settings?
Answer Nosocomial diseases
11. Which portal of exit can expel the most viral particles?
Answer Respiratory
12. Which type of disease is sickle cell anemia?
, Answer Noninfectious
13. Which type of transmission occurs when tuberculosis is spread through
small particles expelled by a cough?
Answer Droplet transmission
14. Which type of transmission occurs when pathogens are spread from mother
to child during breastfeeding?
Answer Vertical direct contact transmission
15. Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body?
Answer Biological vector transmission
16. Which type of transmission occurs through contact with a fomite?
Answer Indirect contact transmission
17. Which infected host would be considered a passive carrier?
Answer A healthcare professional who does not wash their hands after seeing an infected patient
18. How is Giardia lamblia, the causative agent of giardiasis, transmitted?
, Answer Conta- minated food or water
19. Which organism is the definitive host of Toxoplasma gondii?
Answer Birds
FOR OA
1. What is a characteristic of rhizospheres?
Answer The rhizosphere is where plants release organic compounds that can be metabolized by
microbes into soil.
2. Which environment would contain microbes that are psychrophilic?
Answer Glaciers
3. What is the role of nematodes in soil?
Answer They photosynthesize and fix nitrogen.
4. Which eukaryote is responsible for producing antibiotics to ward off bacterial
competitors?
Answer Fungi
5. Which symbiotic relationship is an example of mutualism?
Answer The relationship between humans and the Escherichia coli colonizing the human gut
6. Which type of symbiotic relationship exists between the Escherichia coli (E.
,coli) that inhabit the human gut and the humans who utilize the vitamin K
produced by E. coli?
Answer Mutualism
7. Which description of resident microbiota is true?
Answer Resident microbiota constantly live on the human body.
8. Which relationship is exhibited by intestinal Escherichia coli and their human
host?
Answer Mutualism
9. Which type of disease is transmitted from animals to humans?
Answer Zoonotic diseases
10. Which type of disease is acquired in hospital settings?
Answer Nosocomial diseases
11. Which portal of exit can expel the most viral particles?
Answer Respiratory
12. Which type of disease is sickle cell anemia?
, Answer Noninfectious
13. Which type of transmission occurs when tuberculosis is spread through
small particles expelled by a cough?
Answer Droplet transmission
14. Which type of transmission occurs when pathogens are spread from mother
to child during breastfeeding?
Answer Vertical direct contact transmission
15. Which type of transmission occurs when an arthropod carries a viral
pathogen inside of its body?
Answer Biological vector transmission
16. Which type of transmission occurs through contact with a fomite?
Answer Indirect contact transmission
17. Which infected host would be considered a passive carrier?
Answer A healthcare professional who does not wash their hands after seeing an infected patient
18. How is Giardia lamblia, the causative agent of giardiasis, transmitted?
, Answer Conta- minated food or water
19. Which organism is the definitive host of Toxoplasma gondii?
Answer Birds
