2. Kingdom for Virus? Where do viruses belong?

3. Are Viruses Living or Non-living? Characteristics of life VirusCell Growth Homeostasis Metabolism Mutation Nucleic Acid Reproduction

4. Are Viruses Living or Non-living? Characteristics of life VirusCell GrowthNoYes HomeostasisNoYes MetabolismNoYes MutationYes Nucleic AcidDNA or RNADNA ReproductionOnly with hostCell Divison

5. Viral structure : Capsid: Protein Coat DNA or RNA for replication Adsorb-tion site Host specific May have a envelope

7. Bacteriophage Bacteria “eating” virus Virus uses the bacteria as a host For viral replication

8. Example: Plant Peach Virus 5.Virus can infect Plants Fungi Animals Bacteria Protists

9. Viral Replication Lytic cycle Viral DNA is injected into host cell Contains instructions needed to make more viruses Host cell replicates viral DNA and makes the viral capsids (protein coats) New viruses are assembled inside host cell Cell bursts open releasing new viruses

10. Lytic Cycle (Replication) of a Virus 1.Adsorption of virus onto the host 2. Insertion of Virus DNA into host cell 3. Replication of Viral DNA 4. Assembly of protein coat 5.Lysis of Host cell Membrane & release Of virus

11. Lytic Cycle

12. Viral Replication:

13. Viral Replication Lysogenic cycle Viral DNA is injected into the host cell Vial DNA inserts itself into the host’s DNA Remains inactive for days, months, or years As the cell reproduces, more cells are produced that have the viral DNA in them Eventually, the virus will enter the lytic cycle

14. Transduction: Viral DNA becomes inserted Into the Bacteria DNA (1/100,000 )

16. Lysogenic Cycle

17. Viruses and Human Disease

18. Herpes Simplex:

19. Warts Are a Skin Virus!

20. Plantar Wart

21. Chicken Pox & Polio Virus

22. Chicken Pox and Polio Virus

23. Rabies virus Hepatitis B (Liver)

25. HIV Virus

26. Cow Pox Vaccination 1749 Acquired Immunization Artificial injection of a small amount of virus Body’s immune response makes antibodies

27. Emerging Viruses Ebola