Question

mad cow disease is caused by a noncellular infectious agent called a
multiple choice
satellite virus.
scrapie.
prion.
viroid.

Explanation:

Mad cow disease, also known as bovine spongiform encephalopathy (BSE), is caused by prions. Prions are non - cellular infectious agents composed of misfolded proteins. They can induce abnormal folding of normal proteins in the brain, leading to neurodegenerative diseases. Satellite viruses require a helper virus for replication and are not related to mad cow disease. Scrapie is a similar prion - related disease in sheep, not the causative agent of mad cow disease itself. Viroids are plant pathogens made of single - stranded RNA and have no connection to mad cow disease.

Answer:

C. prion