Similar to LDL internalization 2. DNA viruses - similar process as host cell replication and transcription. Some largepoly-protein made and processed into many. Retro - ssRNA Use tRNA primer for polymerase. Parent RNA removed by RNase dsDNA made.
Nuclear viruses use host polymerase.
Cytoplasmic viruses have own polymerase. Sometimes in opposite directions Some genes overlap, some in different reading frame. Introns only with nuclear viruses. Poly A added to 3' to stabilize and transport to cytoplasm. Example in some detail - SV40 Ex.