Chapter 18

Chapter 18 - Chapter 18 The Genetics of Viruses and Bacteria Viral Structure o Virus"Poison = Latin Infections particles consisting of nucleic acid

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Chapter 18- The Genetics of Viruses and Bacteria - Viral Structure o Virus: “Poison” = Latin Infections particles consisting of nucleic acid, RNA or DNA in a protein coat o Capsid Viral envelopes DNA or RNA Protein shell Different shapes o Bacteriophages Virus that infects bacteria T1 – T7 even numbers are similar - Viral Reproduction: Lytic Cycle o Host range: infection of a limited range of host cells (receptor molecules on the surface of cells) = protein o Lytic Cycle: 1. Attachment 2. Injection 3. Hydrolyzation = using water to break bonds of nucleic acids in cell 4. Assembly 5. Release Results in death of host cell Virulent virus (phage reproduction only by the lytic cycle) - Viral Reproduction: Lysogenic Cycle o Genome replicated without destroying the host cell o Genetic material of virus becomes incorporated into the host cell DNA (prophage DNA) o Temperate Virus (phages capable of using the lytic and lysogenic cycles)
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This note was uploaded on 10/31/2011 for the course BIO 102 taught by Professor Robinson during the Spring '09 term at UPenn.

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Chapter 18 - Chapter 18 The Genetics of Viruses and Bacteria Viral Structure o Virus"Poison = Latin Infections particles consisting of nucleic acid

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