define virus and write its genetic material.
A virus is a small infectious agent that replicates only inside the living cells of other organisms, such as animals, plants, and bacteria. It consists of a genetic material (either DNA or RNA) surrounded by a protein coat, and sometimes also an outer lipid membrane envelope.
The genetic material of a virus can be either DNA or RNA, but not both. Some viruses have single-stranded DNA (ssDNA) as their genetic material, while others have double-stranded DNA (dsDNA). Similarly, some viruses have...