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Viruses & Bacteria

Viruses & Bacteria. A guide to understanding the similarities and differences of viruses and bacteria. Two Monera Kingdoms. Archaebacteria Eubacteria. Archaebacteria. Ancient life form Live in extreme environments More than 300 million years old. Eubacteria.

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Viruses & Bacteria

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  1. Viruses & Bacteria A guide to understanding the similarities and differences of viruses and bacteria

  2. Two Monera Kingdoms • Archaebacteria • Eubacteria

  3. Archaebacteria • Ancient life form • Live in extreme environments • More than 300 million years old.

  4. Eubacteria • Most abundant form of life on Earth. • Make foods, cause diseases and decompose matter. • Live in warm, pH balanced, low-salt environments. • Different cell membranes and RNA than Archaebacteria.

  5. Viruses • Greek word meaning “to poison”. • Measured in nanometers (nm). • A nanometer is = to 1 billionth of a meter. • Viruses have 2 parts: a core of hereditary material and an outer coat of protection. • A bacteriophage is a type of virus that infects a bacteria.

  6. Bacteriophage • It is a virus. • It attaches to bacteria with it’s tail. • It sends it’s genetic material from it’s head to it’s tail. • More of the virus reproduces in the host bacteria.

  7. Viruses come in many shapes and sizes! • Viruses range in size from 10-250 nm. • They do not have cells. • They are non-living. • They contain hereditary material (DNA or RNA). • Most must have a host to survive. • Strong protein coat.

  8. Bacteria • Kingdom: Moneran has been split into the Acheabacteria Kingdom and the Eubacteria Kingdom. • One celled organisms. • No nucleus • Oldest form of life on Earth. • Most live in colonies.

  9. Three types of bacteria • Spirilla (spigh-RIHL-uh) • Spirillum (singular) • Cork-screw shaped.

  10. Cocci • Cocci (KAHK-sigh) • Coccus (singular) • Spherical shaped

  11. Bacilli • Bacilli (buh-SIHL-igh) • Bacillus (singular) • Rod shaped.

  12. Movement of Bacteria • Bacteria move with Flagella. • These are tail like structures that help the bacteria to move in liquid.

  13. Reproduction • Bacteria reproduce by Binary Fission. • They split in half! • When food is scarce bacteria can form an Endospore. • This is a protective resting cell.

  14. They can double in number every 20 minutes!

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