NEET BIOLOGY

Detailed explanation-1: -Any particular virus contains only a single kind of nucleic acid. However, this may be DNA or RNA; indeed, the RNA viruses provide the only instance in nature in which RNA is the exclusive repository of genetic information.

Detailed explanation-2: -Viruses contain nucleic acid as RNA or DNA. These molecules possess all the genetic information of the virus.

Detailed explanation-3: -All true viruses contain nucleic acid-either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid)-and protein. The nucleic acid encodes the genetic information unique for each virus.

Detailed explanation-4: -Virus Core Structure Small virions are simple nucleocapsids containing 1 to 2 protein species. The larger viruses contain in a core the nucleic acid genome complexed with basic protein(s) and protected by a single-or double layered capsid (consisting of more than one species of protein) or by an envelope (Fig.