This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Prion structure contains primarily - 
Select and explain. 
A. Protein, B. DNA, C. RNA, D. Both DNA 8c RNA
A: Protein
Answer: A: Protein 
Explanation: Ans. is 'a' i.e., Protein * Prions are infectious particle which contains protein only.* They do not have nucleic acid.Prions have been defined as -Small proteinaceous infectious particle which resist inactivation by procedures that modify nucleic acids.