1
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WGU D311: Microbiology with Lab: Section
2 Exam 2025 UPDATE/PRACTICE
QUESTIONS AND CORRECT VERIFIED
ANSWERS(complete solutions)ASSURED
SUCCESS/GRADED A+!!!
What is a characteristic of rhizospheres?—Ans: The rhizosphere is
© 2025 Assignment Expert
where plants release organic compounds that can be
metabolized by microbes into soil.
Which environment would contain microbes that are
psychrophilic?—Ans: Glaciers
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What is the role of nematodes in soil?—Ans: They prey on
bacteria, smaller nematodes, fungi, and even plant roots.
Which eukaryote is responsible for producing antibiotics to ward
off bacterial competitors?—Ans: Fungi
Which symbiotic relationship is an example of mutualism?—Ans:
The relationship between humans and the Escherichia coli
colonizing the human gut.
Which type of symbiotic relationship exists between the E. coli that
inhibit the human gut and the humans who utilize the vitamin K
produced by E. coli?—Ans: Mutualism
Describe resident microbiota.—Ans: Resident microbiota
constantly live on the human body.
Which relationship is exhibited by intestinal E. coli and their human
host?—Ans: Mutualism
Which type of disease is transmitted from animals to humans?—
Ans: Zoonotic diseases
, 2
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Which type of disease is acquired in hospital settings?—Ans:
Nosocomial diseases
Which portal of exit can expel the most viral particles?—Ans:
Respiratory
Which type of disease is sickle cell anemia?—Ans: Noninfectious
Which type of transmission occurs when tuberculosis is spread
through small particles expelled by a cough?—Ans: Droplet
transmission
Which type of transmission occurs when pathogens are spread
from mother to child during breastfeeding?—Ans: Vertical direct
contact transmission
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Which type of transmission occurs when an arthropod carries a
viral pathogen inside of its body?—Ans: Biological vector
transmission
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Which type of transmission occurs through contact with a
fomite?—Ans: Indirect contact transmission
Which infected host would be considered a passive carrier?—Ans:
A healthcare professional who does not wash their hands after
seeing an infected patient.
How is Giardia lamblia, the causative of giardiasis, transmitted?—
Ans: Contaminated food or water.
Which organism is the definitive of Toxoplasma gondii?—Ans: Cats
Which disease is transmitted by animals but not arthropods?—Ans:
Rabies
How can adhesins be described?—Ans: Adhesins found on the
surface of pathogens bind to receptors of hist cells.
Describe a portal of entry.—Ans: Body features through which
pathogens can enter host tissue.
Pathogens produce proteins to prevent the fusion of the
phagosomes and the lysosome (phagolysosome). Why does this
virulence factor facilitate invasion?—Ans: It prevents the exposure
of pathogens to lethal digestive enzymes.
For Expert help and assignment solutions, +254707240657
WGU D311: Microbiology with Lab: Section
2 Exam 2025 UPDATE/PRACTICE
QUESTIONS AND CORRECT VERIFIED
ANSWERS(complete solutions)ASSURED
SUCCESS/GRADED A+!!!
What is a characteristic of rhizospheres?—Ans: The rhizosphere is
© 2025 Assignment Expert
where plants release organic compounds that can be
metabolized by microbes into soil.
Which environment would contain microbes that are
psychrophilic?—Ans: Glaciers
Guru01 - Stuvia
What is the role of nematodes in soil?—Ans: They prey on
bacteria, smaller nematodes, fungi, and even plant roots.
Which eukaryote is responsible for producing antibiotics to ward
off bacterial competitors?—Ans: Fungi
Which symbiotic relationship is an example of mutualism?—Ans:
The relationship between humans and the Escherichia coli
colonizing the human gut.
Which type of symbiotic relationship exists between the E. coli that
inhibit the human gut and the humans who utilize the vitamin K
produced by E. coli?—Ans: Mutualism
Describe resident microbiota.—Ans: Resident microbiota
constantly live on the human body.
Which relationship is exhibited by intestinal E. coli and their human
host?—Ans: Mutualism
Which type of disease is transmitted from animals to humans?—
Ans: Zoonotic diseases
, 2
For Expert help and assignment solutions, +254707240657
Which type of disease is acquired in hospital settings?—Ans:
Nosocomial diseases
Which portal of exit can expel the most viral particles?—Ans:
Respiratory
Which type of disease is sickle cell anemia?—Ans: Noninfectious
Which type of transmission occurs when tuberculosis is spread
through small particles expelled by a cough?—Ans: Droplet
transmission
Which type of transmission occurs when pathogens are spread
from mother to child during breastfeeding?—Ans: Vertical direct
contact transmission
© 2025 Assignment Expert
Which type of transmission occurs when an arthropod carries a
viral pathogen inside of its body?—Ans: Biological vector
transmission
Guru01 - Stuvia
Which type of transmission occurs through contact with a
fomite?—Ans: Indirect contact transmission
Which infected host would be considered a passive carrier?—Ans:
A healthcare professional who does not wash their hands after
seeing an infected patient.
How is Giardia lamblia, the causative of giardiasis, transmitted?—
Ans: Contaminated food or water.
Which organism is the definitive of Toxoplasma gondii?—Ans: Cats
Which disease is transmitted by animals but not arthropods?—Ans:
Rabies
How can adhesins be described?—Ans: Adhesins found on the
surface of pathogens bind to receptors of hist cells.
Describe a portal of entry.—Ans: Body features through which
pathogens can enter host tissue.
Pathogens produce proteins to prevent the fusion of the
phagosomes and the lysosome (phagolysosome). Why does this
virulence factor facilitate invasion?—Ans: It prevents the exposure
of pathogens to lethal digestive enzymes.
