2022 Phase 2 Biological ClassificationViruses, viroids and prions Easy Question 2 of 6 in Viruses, viroids and prions

Mad cow disease in cattle and Cr Jacob disease in humans are due to infection by ________.

A Prion
B Bacterium
C Virus
D Viroid

The answer is A.

Solution

Bovine spongiform encephalopathy (mad cow disease) in cattle and Creutzfeldt-Jakob disease in humans are caused by prions, which are abnormally folded proteins.

Concept Viruses, viroids and prions

Viruses, viroids and prions in past papers

6 questions from this chapter have appeared across 6 exam years.