Biology 1202B Chapter Notes - Chapter 23: Lambda Phage, Lysogenic Cycle, Influenza A Virus Subtype H3N2
4 Aug 2017
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Document Summary
At any given time, 5 to 25% of the global population of people exhibits the symptoms of in uenza. East and southeast asia this regional network of overlapping epidemics appeared to be the source of in uenza outbreaks elsewhere in the world. Although they are not considered to be alive, viruses are classi ed into orders, families, genera and species using criteria : including . However not all viruses are pathogens: many viruses actually bene t their hosts. 2015-01-10 for example infection by certain nonpathogenic viruses protects human hosts against pathogenic viruses. Once inside, the linear chromosome forms a circle and then follows one of 2 paths: sophisticated molecule switches govern which path is follow at the time of infection. One path is the lytic cycle (like the lytic cycles of virulent phages: starts with steps 1 and 2 infection, then foes directly in steps 7, 8 and 9 production and release of progeny virus.
