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Microorganisms and Disease

Microorganisms and Disease
Which of these cytokines is also known under the name cachectin?

Interferon gamma
Tumor necrosis factor (TNF)
Interleukin 2
None of these

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Microorganisms and Disease
Which of the following disease is not caused by microbial protein toxin?

Shigella dysentery
Tuberculosis
Diphtheria
Botulism

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Microorganisms and Disease
Both Mycobacterium tuberculosis and Streptococcus pneumoniae

stay in the lung and rarely, if ever, enter the bloodstream
have cell walls that contain a high content of mycolic acids
have polysaccharide capsules
are acquired by inhalation

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Microorganisms and Disease
Which is not a major defense mechanism in the stomach?

Dense normal flora
Proteolytic enzymes
Low pH
All of these

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Microorganisms and Disease
Lactoferrin helps to protect against pathogens by

lowering the pH
sequestering Iron
facilitating the growth of normal flora
blocking sebum production

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Microorganisms and Disease
The agent responsible for causing mad cow disease is thought to be a

protozoan
virus
fungus
prion

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