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Chapter 6&7 (Through the cell (Microscope of biochem. (Light…

- - - - visible light is passed through a specimen and then through glass lenses
      - Lenses refract (bend) the light so that the image is magnified
      - Allows you to see very small things such as bacteria
    - - Allows you to see things such as lipids and proteins in a molecules
      - used to study subcellular structures
    - - Things such a protein can be seen
      - focus a beam of electrons onto the surface of a specimen, providing images that look 3-D
    - - focus a beam of electrons through a specimen
      - used mainly to study the internal structure of cells
  - - - DNA is found in the nucleolus
      - No nucleus
      - Cytoplasm bound by the plasma membrane
    - - DNA in a nucleus that is bounded by a double membrane
      - Cytoplasm in the region between the plasma membrane and nucleus
      - Eukaryotic cells are generally much larger than prokaryotic cells