2.8 Compare and contrast a virus and a cell in terms of genetic material and reproduction.
Vocabulary Tier 3
Host - the cell a virus infects Virus - an organism? a chemical? that survives by infecting host cells Infection - process of a bacteria or virus entering your body Vaccine - a weakened virus taken into your body to build immunity against the REAL virus Protein coat - the outside of a virus. The are not cells and have no membranes.
Essential Questions 1. How does a virus use a host cell?
2. Why does a virus use a host cell?
Viruses:
Viruses reproduce using a host cell. * They enter a cell using a protein "key" then trick the cell into making more viruses
Polio virus.
Notice all the proteins sticking out of the protein coat
A couple examples of viruses.
The one on the left actually invades bacteria!
The FLU
Vaccines
Vaccines are given to people to build immunity. You are given a dead or weak virus so your immune system can know what it looks like and fight it if the real thing enters your body.
The Flu shot is given every year because it evolves so fast.