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