A typical virus proteins on its
that bind to outer membrane of
host cell. In place where the
adhered viral proteins to break the
membrane and then virus
injects its molecules into the
cell.

Within the cell the viral is
transcripted and messenger RNA is
. Viral mRNA then
and viral proteins made.

Viral polypeptides within the host
are cut by called proteases
and copies of the are
assembled with newly formed
proteins. the assemblage of
viruses is completed cell membrane
breaks the viruses are to
the outside. sole infected cell
produce hundreds of .