The genome of virus particles is unusual. Review structure of viruses. Capsid and either DNA or RNA in genome but never both. Don't have their own metabolic machinery. Virus particles don't have ribosomes, cell membranes, storage granules or vacuoles, mitochondria or any organelles.
Viruses use the host's metabolic machinery, so all viruses are obligate intracellular parasites.
Virus particles usually use host protein synthesis enzymes but sometimes they bring some enzymes of their own. Viruses must also replicate their genome somehow to make more viruses inside the host cell. Do this in several ways. All viruses want to do is to reproduce themselves, but they have to use the host cell machinery to do so. Usually end up disrupting or stopping normal cell functions while cell is redirected by virus to make new virus particles.