Both DNA and RNA found in a) Bacteria b) Prion c) Viriod d) Plasmid Answer: Bacteria Explanation: 1. A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell’s chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes. 2. Viroids are plant pathogens that consist of a short stretch of highly complementary, circular, single-stranded RNA. 3. A prion is an infectious agent composed of protein in a mis-folded form. Prion diseases or transmissible spongiform encephalopathies (TSEs) are a family of rare progressive neurodegenerative disorders that affect both humans and animals.