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Viruses

Viruses. Are they alive?. Figure 18.1 Comparing the size of a virus, a bacterium, and a eukaryotic cell. Protein Coat DNA or RNA Enzyme. Virus Structure. Figure 18.2 Viral structure. No metabolism Cannot reproduce on their own Cannot move No respiration Do not eat

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Viruses

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  1. Viruses Are they alive?

  2. Figure 18.1 Comparing the size of a virus, a bacterium, and a eukaryotic cell

  3. Protein Coat DNA or RNA Enzyme Virus Structure

  4. Figure 18.2 Viral structure

  5. No metabolism Cannot reproduce on their own Cannot move No respiration Do not eat No cellular structures What viruses cannot do

  6. Figure 18.3 A simplified viral reproductive cycle

  7. DNA to mRNA to Ribosomes to make new viruses RNA to Ribosomes to make new viruses Result – the cell dies Mode of Attack

  8. Figure 18.4 The lytic cycle of phage T4

  9. Figure 18.02x1 Adenovirus

  10. Figure 18.02x2 Phages

  11. Lytic = RNA or DNA routes Lysogenic = RNA to DNA to mRNA to Ribosomes – A reverse route through the cell. Pathways

  12. Figure 18.5 The lysogenic and lytic reproductive cycles of phage , a temperate phage

  13. Table 18.1 Classes of Animal Viruses, Grouped by Type of Nucleic Acid

  14. Ebola and Hantavirus

  15. Created the first immunization against smallpox about 200 years ago. The dead virus spurs the immune system to prepare for the real virus ahead of time. Edward Jenner

  16. Figure 18.6 The reproductive cycle of an enveloped virus

  17. Human Immunodeficiency Virus (HIV)

  18. The HIV Virus

  19. History of the virus Other types (FELV), (SIV) and (HTLV) Where did it come from? Immunizations? Cure? HIV I and HIV II HIV

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