题目内容

Kuru is a fatal disease of certain New guinea natives and is characterized by tremors and ataxia; Creutzfeldt-Jakob disease (CJD) is characterized by both ataxia and dementia. These diseases are thought to be caused by

A. Slow viruses
B. Cell wall-deficient bacteria
C. Environmental toxins
D. Prions

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Mad Cow Disease has been highly publicized in Great Britain. This disease, which is similar to scrapie, is caused by

A prion
B. A virus
C. Rickettsiae
D. An autoimmune reaction
E. A bacterium with a defective cell wall

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