Nur Fatmawati
16611047
Size Regulation of ss-RNA Viruses
An RNA virus is a virus that has RNA as its genetic material. This nucleic acid is
usually single-stranded RNA (ssRNA) but may be double-stranded RNA (dsRNA). Notable human diseases caused
by RNA viruses include Ebola
hemorrhoragic fever, SARS, the common cold, influenza, hepatitis C, West Nile fever, polio and measles. The International Committee on Taxonomy of Viruses classifies RNA
viruses as those that belong to Group
III, Group IV or Group V of the Baltimore
classification system of classifying viruses and does not consider viruses
with DNA intermediates in their life cycle
as RNA viruses. Viruses with RNA as their genetic material which also
include DNA intermediates in their replication cycle are called retroviruses, and
comprise Group VI of
the Baltimore classification. Notable human retroviruses include HIV1 and HIV2, the cause of the
disease AIDS.
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