answersLogoWhite

0

Major groups of viruses are distinguished first by their nucleic acid content as either RNA or DNA viruses. Subsequent subdivisions are based largely on other properties of nucleic acids. The RNA viruses can be single-stranded (ssRNA) or double-stranded (dsRNA), although most are single-stranded. Because most eukaryotic cells do not have the enzymes to copy viral RNA molecules, the RNA viruses must either carry the enzymes or have the genes for those enzymes as part of their genes.

Like RNA viruses, DNA viruses can also occur in single-stranded or double-stranded form.

User Avatar

Wiki User

11y ago

What else can I help you with?