Roots of Life: Chapter 2 Section 1: Viruses

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lcayward
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227941
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Roots of Life: Chapter 2 Section 1: Viruses
Updated:
2013-07-23 13:13:23
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Roots Life Chapter Virus
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Vocabulary
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  1. VIRUS
    a tiny, nonliving particle that enters and then reproduces inside a living cell
  2. WHAT CHARACTERISTICS TO VIRUSES SHARE?
    • 1. non living
    • 2. they are NOT cells
    • 3. do NOT use their own energy to row or respond to their surroundings
    • 4. cannot make their own food, take in food, or produce wastes
    • 5. like organisms, they CAN multiply
    • 6. acts like a parasite
  3. VIRUSES CAN ONLY MULTIPLY WHEN. . .
    inside a living cell
  4. HOST
    an organism that a virus enters and multiplies inside.

    it provides a source of energy for a virus or another organism.
  5. PARASITE
    an organism that lives on or in a host and causes it harm
  6. WHAT SHAPES ARE VIRUSES?
    • round
    • rod shaped
    • like bricks, threads, or bullets
    • complex, robot-like shapes 
    • tube shaped
  7. BACTERIOPHAGE
    a virus that infects bacteria

    it means "bacteria eater"
  8. VIRUSES ARE MEASURED IN . . .
    nanometers because they are so small
  9. HOW ARE VIRUSES NAMED?
    • 1. after the disease they cause (polio)
    • 2. after the organisms they infect (tobacco mosaic)
    • 3.  after the person/people who discovered it (Epstein-Barr (mono))
  10. TWO BASIC PARTS OF ALL VIRUSES
    • protein coat that protects the virus
    • inner core made of genetic material
  11. WHAT INFORMATION DOES VIRUS'S GENETIC MATERIAL CONTAIN?
    the genetic instructions for making new viruses
  12. LIKE KEYS, A VIRUS'S PROTEINS FIT ONLY INTO . . .
    certain locks, or proteins, on the surface of the host's cell.
  13. DUE TO THE LOCK-AND-KEY ACTION OF A VIRUS, A CERTAIN VIRUS CAN ONLY ATTACH TO. . .
    one or a few types of cells.
  14. HOW OD VIRUSES MULTIPLY?
    • 1. attach to host cell
    • 2 enters cell
    • 3 genetic material then takes over cell's functions
    • 4 it instructs the cell to produce virus's proteins and genetic material
    • 5 the protein and genetic material assemble into new virus (immediate or hidden)
  15. WHAT IS AN ACTIVE VIRUS?
    after a virus enters a cell, an active virus immediately goes into action
  16. HIDDEN VIRUS
    the virus enters a cell and remains hidden for awhile (cold sore virus)
  17. HOW ARE VIRUSES BAD?
    they can cause diseases

    -cold, flu, AIDS in humans 

    -rabies and distemper in dogs and cats
  18. HOW ARE VIRUSES USEFUL?
    • 1 gene therapy
    • 2 injections to protect animals
  19. WHAT IS GENE THERAPY?
    a medical technique where scientists can use a virus to treat certain disorders.  It works by adding genetic material to a virus to deliver the genetic material

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