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Transcript
20.1 Viruses Nov. 13th, 2012 1. Bacteriophages are viruses that attack bacteria 2. Viruses are particles of nucleic acid, protein and some cases lipids that can reproduce only by infecting living cells. 3.A capsid is a virus protein coat 4. A virus gets inside a cell by binding receptors to its surface. 5. Once inside the viral genes are expressed. This may lead to the cells destruction. 6. Like the outlaw the virus takes control 7. Lytic cycle -virus -host bacteria -viral DNA -bacterial DNA Lytic cycle 8. The viral DNA is inserted into the host cell’s DNA and is copied each time a cell multiplies 9. They are both RNA viruses. 10.The virus would never reproduce They depend on living cells!!!!
