microbiology key facts/concepts lect. 1

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Anonymous
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100131
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microbiology key facts/concepts lect. 1
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2011-09-06 20:57:56
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Microbiology
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Lecture 1 key facts/concepts
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  1. How are microorganisms important?
    1.
    2.
    3.
    4.
    5.
    1. Oldest life form

    2. Most abundant (more than BUGS!)

    3. Carry out major processes for bio-geochemical cycles (Recycling! inroganic->organic material)

    • 4. Can live in places unsuitable for other organisms
    • (Resilient)

    • 5. Other life forms require microbes to survive
    • (others depend on them)
  2. How many bacterial cells are in a colony?

    a. 1000
    b. 1,000,000
    c. 10
    d. 10,000,000
    How many bacterial cells are in a colony?
  3. a. 1000
    • b. 1,000,000
    • c. 10
    • d. 10,000,000
    • 2 mm
  4. What are the characteristics of living things?

    1.
    2.
    3.

    4.
    5.
    6.
    What are the characteristics of living things?

    • 1. Eat (metabloism)
    • 2. Grow/Reproduce
    • 3. Evolve

    • 4. Move
    • 5. Differentiate
    • 6. Communicate
  5. Name the two ways cells behave?

    1.
    2.
    Name the two ways cells behave?

    • 1. As catalyists: carrying out chemcial reactions
    • 2. As coding devices: (making proteins)
  6. When did blue green algae (cyanobacteria) come about?
    3.8 billion years ago!!!
  7. When did plants come about?
    600 million years ago!!!

    or

    .6 x 109 yrs ago
  8. When did humans come about?
  9. What did cyanobacteria excrete?
    Oxygen
  10. Life on Earth timeline

  11. Earth level Homeostatsis- environment on microbe
    Microbe Evolution/microbial growth

    Resources (nutrients) and environmental conditions controll?
    Diversity and Abundance
  12. Earth level Homostatasis- Mircobe on environment

    Microbial communities affect?
    The physical and chemical properties of their habitats
  13. Microbial communities have?
    different microbe species
  14. Bacteria type:
    Red=
    Green=
    • Bacteria type: Nitrifing bacteria sewage
    • Red= ammonia (NH3) oxidizers
    • Green= nitrite (NO2-) oxidizers
  15. Name of the first cell?
    • LUCA
    • (last universal common ancestor)
  16. The number of microbes in the world approximately is?
    5 x 1030 cells
  17. Where can you find microbes?
    In almost any environment, but MOST are found in oceans and terrestrial subsurfaces
  18. TRUE/FALSE

    The greater number of microbes are benefical rather than harmful
    True
  19. TRUE/FALSE

    There are more harmful microbes than benefical ones
    False
  20. How do microbes benefit humans?
    • 1. Bioremediation (pollution clean up)
    • 2. Biofuels
    • 3. Agriculture (fertilize soil through nitrogen fixation)
    • 4. Medicine (gene therapy, drug/protein production)
  21. For microbial based foods, what are the negative and positive impacts?
    Negative: can require specialized preservatives

    • Postive: fermentation
    • 1. Makes alcohol
    • 2. Leavens bread
    • 3. Perservation technique-> to create lactic acid in sour foods such as sauerkraut, dry sausages, kimchi and yogurt, or vinegar (acetic acid) for use in pickling foods.

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