Transmissible Spongiform Encephalopathies, Such as Scrapie, Mad Cow Disease, Creutzfeldt

Multiple Choice

Transmissible spongiform encephalopathies, such as scrapie, mad cow disease, Creutzfeldt Jakob disease, and kuru, are caused by an infectious agent known as a prion. Prions are composed of

A) protein only.
B) protein and RNA.
C) protein and DNA.
D) RNA surrounded by a lipid-protein coat.