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?Kingdom for virus? (Prokaryota & Monera)
Virus Ch 18.1
Prokaryotes = no membrane bound organelles (no nucleus or mitochondria)
Warts are a skin virus!
Virus structure:
Protein Coat
DNA or RNA for replication
Adsorb-tion site
Host specific
Are viruses living or non-living?
Nonliving 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
4..Bacteriophage
Bacteria “eating” virus
Virus uses the bacteria as a host
For Viral replication
Plant peach virus
5.Virus can infect
PlantsAnimalsBacteria
Herpes mouth virus:
Chicken Pox & Polio Virus
Rabies virus Hepatitis B (Liver)
Cow pox vaccination 1749
Acquired Immunization
Artificial injection of a small amount of virus
Body’s immune response makes antibodies
Lytic Cycle (Replication) of a Virus - “AVIRAL”
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 cellMembrane& release Of virus
Viral Replication:
HIV virus structure:
HIV Virus
HIV virus infects T-cells HIV virus
Weakens the immune system
AIDS patients die of “common” diseases when T cell (WBC) count falls
AIDS = break down of the immune system & death due to common diseases versus death by AIDS virus
Transduction:
Viral DNA becomes inserted Into the Bacteria DNA (1/100,000)
Genetic Engineering of Insulin
Restriction Enzymes:Made by some Bacteria