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Microbiology - Microorganisms and Disease

Exercise : Microorganisms and Disease - Section 1
  • Microorganisms and Disease - Section 1
11.
Type III secretion systems are used to inject "effector" proteins directly into a host cell. Salmonella uses a type III secretion system to help the pathogen to
survive the acid pH of the stomach
secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine
survive within macrophages
activate T cells to proliferate and secrete cytokines
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Which of these cytokines is also known under the name cachectin?
Interferon gamma
Interleukin 2
Tumor necrosis factor (TNF)
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Which is not a major defense mechanism in the stomach?
Proteolytic enzymes
Low pH
Dense normal flora
All of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The agent responsible for causing mad cow disease is thought to be a
fungus
protozoan
prion
virus
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
The "A" subunit of diphtheria toxin
binds host cell receptors found on heart cells
cause ADP ribosylation of a factor involved in protein synthesis
forms cAMP that leads to fluid accumulation
lysis macrophages with the release of cytokines
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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