The correct option is 2: Prions Prions, a term coined by Stanley B. Prusiner in the 1980s, represent a unique and puzzling class of infectious agents composed entirely of protein. Their name is derived from "proteinaceous infectious particle," which is their defining characteristic: they are infectious without possessing any genetic material, such as DNA or RNA. The central concept of prion biology is that an abnormally folded form of a…Read More