title: Viroids.
mesh_terms: D001483:Base Sequence; D004279:DNA, Viral / Q000378:metabolism; D010935:Plant Diseases; D010942:Plant Viruses / Q000502:physiology; D014176:Protein Biosynthesis; D012367:RNA, Viral / Q000378:metabolism; D014772:Viroids / Q000502:physiology; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral