Viruses

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Viruses
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Viruses

• Viruses are not strictly alive, because they
  do not carry out their own life activities and
  reproduction. In other words, without a host
  cell, viruses cannot carry out their
  life-sustaining functions or reproduce. They are
  also non-cellular, which means they are not made
  up of cells. Viruses are so small that they can
  only be viewed under electron microscopes.

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What does a virus look like???
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The Viral Story

• Starring
• T4 bacteriophages
• E. Coli bacterium

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T4 bacteriophages
E. Coli
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?James A. Sullivan
 
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Viruses

• Viruses can infect all sorts of organisms,
  such as bacteria, algae, protozoa, fungi, plants
  and animals. Here are some of the more common
  viruses and the diseases they cause..

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Viruses

• 1. Hepatitis
• 2. Foot-and-Mouth Disease
• 3. Rabies
• 4. West Nile Fever
• 5. SARS (Coronavirus)
• 6. AIDS (human immunodeficiency virus)
• 7. Herpes
• 8. Influenza
• 9. Mumps
• 10. Pox

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Mumps
Hepatitis
Pox
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Viruses

• The fight against viral infection greatly depends
  on the bodys immune system. Vaccination can
  also help to protect those who are infected with
  viral diseases.

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There are over a trillion cells working together
in your body and every cell has information that
allows it to survive and reproduce outside of
your body. This information is used to control
the make up of the cell (the cell's function, the
way it looks, etc...). Where is this information
stored?

• Do you know.

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DNA

• Deoxyribonucleic Acid

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DNA is consisted of two strands coiled around
each other, forming a double helix.
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• Each strand is composed of
• Sugar molecules
• Phosphoric acid molecules
• Organic bases