Cell chapter highlights.txt

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Cell chapter highlights.txt
2011-09-28 21:45:09
Cell Chapter Highlights

Cell Chapter Highlights
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  1. What do microscopes do?
    enable biologists to examine the details of cell structure and to understand how organisms function
  2. What system to scientists use to measure the size of objects?
  3. Light microscopes
    have LOW magnification and can be used to examine living cells
  4. Electron microscopes
    have HIGH magnification but cannot be used to examine living cells
  5. scanning tunneling microscope
    uses a computer to generate a 3 dimensional image of an object
  6. How many parts is in cell theory?
  7. Small Cells vs Large cells
    small cells fuction more efficiently than large cells because small cells have a higher surface area to volume ratio than large cells
  8. Name 4 things all cells have.
    cell membrane, cytoplasm, ribosomes and DNA
  9. Which cells lack internal compartments?
    Prokaryotic cells
  10. Which cells have a nucleus and other organelles, as well as a cytoskeleton and microscopic protein fibers?
  11. What is the lipid bilayer of a cell membrane made of?
    double layer of phospholipid molecules
  12. Name 4 things Proteins in cell membranes have.
    enzymes, receptor proteins, transport proteins and cell-surface markers.
  13. What does the nucleus of a eukaryotic cell do?
    directs the cell's activities and stores DNA
  14. In eukaryotic cells was does the internal membrane system do?
    produces, packages and distributes proteins
  15. What harvests energy from organic compounds to ATP?
  16. What digests and recycles a cell's used compounds?
  17. what 3 structures plant cells have that animal cells lack?
    cell wall, chloroplasts and central vacuole