Final answer:
Replication of most d. dsDNA viruses parallels normal cellular genetic processes of DNA to RNA to protein. RNA viruses, however, employ diverse mechanisms for replication that depend on whether they contain +ssRNA, -ssRNA, or dsRNA, which involves additional steps and viral enzymes.
Step-by-step explanation:
Replication of most dsDNA viruses is similar to normal cellular processes. Group I viruses contain double-stranded DNA (dsDNA) as their genome. Their mRNA is produced by transcription in much the same way as with cellular DNA, using the host's own enzymes. This replication method is akin to the normal flow of genetic information, from DNA to RNA to protein, that is typical in eukaryotic cells.
Contrastingly, RNA viruses, including ssRNA and dsRNA viruses require different mechanisms for replication. Positive-strand ssRNA (+ssRNA) viruses have RNA that can immediately act as mRNA and be translated by the host's ribosomes. Negative-strand ssRNA (-ssRNA) and dsRNA viruses must utilize a viral RNA-dependent RNA polymerase to create a positive RNA strand that can be recognized by the ribosomes.
For instance, retroviruses which belong to Group VI and have a +ssRNA genome utilize reverse transcriptase to create a complementary DNA, then form dsDNA to integrate into the host genome, deviating from the common cellular process.