10.17-10.22 Viruses

1. Viral DNA

Lytic Cycle- results in lysis (breaking open) of host cell◦ The virus turns the cell into a virus-producing

factory Lysogenic Cycle- Viral DNA is replicated w/o

the death of the host cell or phage production◦ Phage becomes a prophage◦ Prophage- DNA of a phage that is inserted by

genetic recombination into the DNA of a prokaryotic chromosome

Viral Reproduction

2. Viruses cause diseases

Viruses affect both plants and animals◦ Viral infections that infect animal cells

Colds, flu, small pox, polio, chicken pox, etc,◦ Viral infections that infect plant cells stunt plant

growth and lowers that amount of crops farmers have to sell