After studying this chapter, you will know: The components of a virus, the differences between lytic and lysogenic cycles, how viruses can introduce genetic variation into host organisms, mechanisms that introduce genetic variation into viral populations.
Ch 19 Warm-up Why many scientists classify viruses as non-living? Draw the basic structure of a virus Label and define capsid, viral envelope and nucleic acid Ch 19 Warm-up Draw the lytic/lysogenic cycle What stage of the lytic-lysogenic cycle is a virus virulent? Temperate? What determines a host range? Viruses Chapter 19 What you must know: The components of a virus The differences between lytic and lysogenic cycles How viruses can introduce genetic variation into host organisms Mechanisms that introduce genetic variation into viral populations Bacteria vs Viruses Bacteria Prokaryotic cell Most are free-living (some parasitic) Relatively large size Antibiotics used to kill bacteria Virus Not a living cell (genes packaged in protein shell) Intracellular parasite 1/1000 size of bacteria Vaccines used to prevent viral infection Antiviral treatment Viruses Very small (