01
Written response
1 point
A microbe contacts a person's skin but does not establish itself there or enter the body. What is the term for this stage?
Free Practice Quiz Question List
8 Microbes and Their Hosts Online Quiz Questions
Use this free practice quiz with 20 questions to review 8 Microbes and Their Hosts, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
A microbe's adhesin binds a receptor found on one type of host tissue but not others. Which property does this receptor match help determine?
- A
Tissue tropism
- B
Colonization resistance
- C
Antigen variation
- D
Virulence
03
Fill in the blank
1 point
A community of microbes remains attached to a surface while embedded in a matrix the microbes produced. This community is called a .
04
True or false
1 point
True or false: A microbe's attachment to a body surface is, by itself, evidence that it is causing disease.
- A
True
- B
False
05
Choose one
1 point
A bacterium has a capsule that helps it persist in a host. Which effect of the capsule best explains how it can aid persistence?
- A
It makes the microbe more easily swept away by fluid flow.
- B
It makes engulfment by phagocytes more difficult.
- C
It causes antibodies to bind more strongly to the microbe.
- D
It prevents the microbe from obtaining nutrients.
06
Choose all
1 point
Which strategies can help microbes resist or avoid host defenses? Select all that apply.
- A
Changing surface features recognized by antibodies.
- B
Living inside host cells to avoid parts of extracellular defense.
- C
Growing in a biofilm that reduces access by immune factors.
- D
Using a surface layer that makes engulfment more difficult.
07
Fill in the blank
1 point
Resident microbes compete with incoming pathogens for space and nutrients, helping prevent them from establishing or expanding. This protective effect is called .
08
Choose one
1 point
A component of a Gram-negative bacterium's outer membrane triggers a strong inflammatory response. What is this component called?
- A
A secreted protein that neutralizes antibodies.
- B
A host molecule that blocks microbial attachment.
- C
An outer-membrane component of many Gram-negative bacteria that can trigger strong inflammation.
- D
A microbial structure that prevents all immune cells from recognizing infection.
09
Written response
1 point
In a host–microbe relationship, the microbe benefits while the host is not substantially affected. What is the name of this type of relationship?
10
True or false
1 point
True or false: A host's immune response can contribute to tissue injury even when it is helping contain an infection.
- A
True
- B
False
11
Choose all
1 point
Which statements correctly match host immune defenses with their actions? Select all that apply.
- A
Innate immunity can recognize common microbial features and recruit phagocytes.
- B
Antibodies primarily engulf microbes and digest them inside the antibody.
- C
Antibodies can block microbial attachment or neutralize toxins.
- D
T cells can help control infection and destroy infected cells.
12
Choose one
1 point
A resident microbe usually causes no harm, but causes disease after entering a normally sterile tissue. Which description best fits this microbe in these circumstances?
- A
A mutualistic microbe
- B
A microbe that causes disease in every host it contacts
- C
A harmless microbe that can never cause disease
- D
An opportunistic pathogen
13
Choose one
1 point
A viral infection impairs and kills some host cells as new virus particles are produced. Which mechanism best explains this damage?
- A
They rely on host antibodies to assemble new virus particles.
- B
They use host-cell machinery to make new virus particles, which can impair or kill infected cells.
- C
They produce bacterial endotoxin that disrupts host-cell function.
- D
They reproduce only outside host cells and leave cell function unchanged.
14
Open ended
1 point
Explain why the same microbe can produce different disease outcomes in different hosts. Define virulence and name at least two host factors that can influence the outcome.
15
True or false
1 point
Inflammation helps contain microbes, but excessive or prolonged inflammation can also damage nearby healthy tissue. True or false?
- A
True
- B
False
16
Written response
1 point
A bacterial protein is secreted and interferes with host-cell processes. What class of bacterial substance is it?
17
Choose one
1 point
A resident microbe gains nutrients from a host, while the host is not substantially affected. Which type of relationship best describes this interaction?
- A
Mutualism
- B
Commensalism
- C
Disease
- D
Colonization resistance
18
Choose one
1 point
A microbe enters a host and multiplies, but the host has no noticeable illness or disruption of normal function. Which description best fits this situation?
- A
Disease, because any microbe inside a host disrupts normal function
- B
Colonization only, because infection always causes noticeable illness
- C
Infection without disease, because the microbe has entered the host but no disruption is described
- D
Exposure only, because infection requires a visible symptom
19
Written response
1 point
Resident gut microbes compete with an incoming pathogen for space and nutrients, making it harder for the pathogen to establish itself. What is this protective effect called?
20
Choose one
1 point
Two bacterial strains reach the same body site, but only one has an adhesin that binds a receptor on the local host cells. Which property of the strain is most directly influenced by this receptor matching?
- A
Tissue tropism
- B
Antigen variation
- C
Colonization resistance
- D
Virulence