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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 replicationAdsorb-tion site Host specific
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
4..Bacteriophage Bacteria “eating” virusVirus uses the bacteria as a host For Viral replication
Plant peach virus 5.Virus can infect Plants Animals Bacteria
Herpes mouth virus:
Chicken Pox & Polio Virus
Rabies virus Hepatitis B (Liver)
Cow pox vaccination 1749 Acquired ImmunizationArtificial injection of a small amount of virus Body’s immune response makes antibodies
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
HIV virus structure:
HIV virus infects T-cellsHIV 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 insertedInto the Bacteria DNA (1/100,000)
Genetic Engineering of Insulin
Restriction Enzymes:Made by some Bacteria
Kingdom Archaebactreria & Eubacteria formally (Prokaryota & Monera)
KEY CONCEPT Infections can be caused in several ways.
Unit 5: Classification and Kingdoms
Viruses Virus- an infectious agent made up of a core of nucleic acid and a protein coat.
Bacteria & Viruses Biology Objective 4.03
Lesson 3 Reading Guide Lesson 7-3 What are Viruses?
Viruses Non-living - does not grow, eat, release waste, or breathe. Is able to reproduce, but only when inside a host (the cell that a virus enters) 100.
Viruses Alive or not?.
Viruses Virus – Latin for “toxin or poison” Particles of nucleic acid, protein, and sometimes lipids Enter living cells and use the cell to produce more.
Notes 9-1 Viruses.
Diversity of Living Things
Viruses Living or Not Virus Virus – small particle made of 1.Nucleic acids either DNA or RNA 2.Surrounded by a protein coat.
Virus, or “Poison” Is it alive? Not really… Depend on cells to reproduce obligate intracellular parasites Inert organic particles when outside.
MICROBIOLOGY Micro:small Bio:life Logy:study Microbiology is the study of living things too small to be seen. Usually, this includes single celled organisms.
Viruses “They Are Not Alive!”.
Lytic Cycle- results in lysis (breaking open) of host cell ◦ The virus turns the cell into a virus-producing factory Lysogenic Cycle- Viral DNA.
Lesson 7-3 What are Viruses?
Viruses A virus is a NON-Living particle made of DNA or RNA and a protein coat. Look at table 25-1 on p. 487 in text book. VERY small. ~ 0.001micron.
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