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Chapter 18 - Viruses.

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Presentation on theme: "Chapter 18 - Viruses."— Presentation transcript:

1 Chapter 18 - Viruses

2 What is a virus? Made of two parts

3 Only infect certain things
Bacteriophage

4 Lytic Life Cycle

5 Viruses that go through lytic cycle
Common cold Flu Measles Chicken pox Ebola Smallpox Polio

6 Lysogenic Life Cycle

7 Viruses that go through the lysogenic cycle
Chicken pox Herpes Hepatitis

8 HIV / AIDS Retrovirus Infects white blood cells and destroys them
Lysogenic life cycle

9 Origin of Viruses Cells came first
Nucleic acids broke from an original host

10 Are Viruses Living? Not made of cells
Can reproduce, but only inside a host Adapt / evolve Do not utilize energy

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