Q. The causative agent of mad-cow disease is a :
A) bacterium
B) prion
C) worm
D) virus
Explanation
[Solution from source] Mad cow disease (bovine spongiform encephalopathy) is caused by prions, abnormally folded infectious proteins. It is not caused by a virus or bacterium. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.