1. ?Kingdom for virus? (Prokaryota & Monera)
Virus Ch 18.1
Prokaryotes = no membrane bound organelles (no nucleus or mitochondria)

2. Warts are a skin virus!

3. Virus structure: Protein Coat DNA or RNA for replication
Adsorb-tion site
Host specific

4. Are viruses living or non-living?
Not cells
Few of life’s criteria
No respiration
No growth
No development
Can be crystalline, dormant
Living
Replicate (with host)
Contain DNA,RNA
Contain protein coat

5. 4..Bacteriophage Bacteria “eating” virus
Virus uses the bacteria as a host
For Viral replication

6. Plant peach virus
5.Virus can infect
Plants
Animals
Bacteria

7. Herpes mouth virus:

8. Chicken Pox & Polio Virus

9. Rabies virus Hepatitis B (Liver)

10. Cow pox vaccination 1749 Acquired Immunization
Artificial injection of a small amount of virus
Body’s immune response makes antibodies

11. Lytic Cycle (Replication) of a Virus - “AVIRAL”
Viral DNA
Adsorption of virus onto the host
5.Lysis of
Host cell
Membrane
& release
Of virus
4. Assembly of
protein coat
2. Insertion of
Virus DNA
into host cell

12. Viral Replication:

13. HIV virus structure:

14. HIV Virus

15. HIV virus infects T-cells
HIV virus Weakens the immune system
AIDS patients die of “common” diseases when T cell (WBC) count falls

16. AIDS = break down of the immune system & death due to common diseases versus death by AIDS virus

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

18. Genetic Engineering of Insulin

19. Restriction Enzymes:Made by some Bacteria