Viruses have

Explanation

All viruses consist of two basic components , a core of nucleic acid that forms the genome and the surrounding coat of protein known as capsid . The capsid gives shape to virus and also protects the genome . Capsid is made up of protein sub - units called capsomeres.
The nucleic acid may be either a double stranded DNA (ds DNA) or single stranded DNA [ss DNA] . In general ,viruses that infect plants have ss RNA and viruses that infect animals have ds DNA.Most viruses that infect plants have ss RNA and viruses that infect animals have dx DNA. Most viruses have a single nucleic acid molecule but a few have more than one Eg: HIV has two identical RNA molecules .