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Viruses and HIV

Viruses and HIV - Viruses Is a Virus a Living Organism...

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Viruses
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Is a Virus a Living Organism? Chapter 1 – Properties of life Cellular Respiration Reproduction Metabolism Homeostasis Heredity Responsiveness Growth and development
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Viruses are not living organisms Viruses do not Grow Have homeostasis Metabolize Viruses do Infect cells and use the cell to make more viruses Cause disease in many organisms
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Parts of a Virion (a virus particle) Nucleic Acid – RNA or DNA Capsid – protein coat that surrounds the DNA or RNA in a virus Lipid Membrane – a membrane around the capsid in many kinds of viruses; helps the virus enter cells (“enveloped” viruses; without the membrane, the virus is “naked”) Made of proteins, lipids, and glycoproteins
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RNA or DNA? Viruses with RNA Human immunodeficiency virus (HIV) Influenza viruses Rabies Viruses with DNA Warts Chickenpox mononucleosis
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Virus Shapes Helical Rodlike with capsid proteins winding around the core in a spiral Tobacco Mosaic Virus
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Virus Shapes Polyhedral Has many sides Most polyhedral capsids have 20 sides and 12 corners
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Virus Shapes Polyhedral capsid attached to a helical tail.
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How do viruses replicate?
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