NURSING ANM AND GNM

Detailed explanation-1: -Viroids are infectious agents that consist only of naked RNA without any protective layer such as a protein coat. Viroids infect plants (but no other forms of life) and are replicated at the expense of the host cell. Viroid genomes are small single-stranded circles of RNA that are only 250–400 bases long.

Detailed explanation-2: -Viroids are single-stranded covalently closed circular RNA molecules existing as highly base-paired rod-like structures.

Detailed explanation-3: -Viroids are single-stranded, covalently closed circular RNA molecules. As a distinct class of pathogens, they are clearly distinguished from viruses by their small size (∼250–400 nt), do not encode any protein and lack a capsid.