most rna viruses are replicated and assembled in cytoplasm within the host.
most rna viruses are replicated and assembled in cytoplasm within the host.
where are most rna viruses replicated and assembled within the host?
in cytoplasm
as a general rule, dna viruses replicate within the nucleus while rna viruses replicate within the cytoplasm. exceptions are known to this rule: poxviruses replicate within the cytoplasm and orthomyxoviruses and hepatitis d virus (rna viruses) replicate within the nucleus.









































four families have segmented genomes: bunyaviridae, orthomyxoviridae, arenaviridae and reoviridae (acronym boar). all are rna viruses.









































three families are transmitted almost exclusively by arthropods: bunyavirus, flavivirus and togavirus. some reoviruses are transmitted from arthropod vectors as well. all are rna viruses.









































only one family of enveloped viruses causes gastroenteritis (coronaviridae). all other viruses associated with gastroenteritis are non enveloped.
viral disease
the most useful and most widely used classification system distinguishes viruses according to the type of nucleic acid they use as genetic material and the viral replication method they employ to coax host cells into producing more viruses: 









































bullet::::- dna viruses (divided into double-stranded dna viruses and single-stranded dna viruses),









































bullet::::- rna viruses (divided into positive-sense single-stranded rna viruses, negative-sense single-stranded rna viruses and the much less common double-stranded rna viruses),









































bullet::::- reverse transcribing viruses (double-stranded reverse-transcribing dna viruses and single-stranded reverse-transcribing rna viruses including retroviruses).
virology