Work Step by Step
Option A is incorrect. A capsid is the protein coat of the virus. Option B is incorrect. A prion is an abnormal protein that causes other proteins to fold incorrectly. Option D is incorrect. A retrovirus is a type of virus that uses RNA as its genetic material instead of DNA. Option C is correct. A bacteriophage is a virus that infects bacteria. The name "bacteriophage" means "bacteria eaters."