EXAM 3

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Author:
baileyac
ID:
71296
Filename:
EXAM 3
Updated:
2011-03-07 13:21:13
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exam
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Description:
BIO Exam 2
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  1. What is the basic living, structural and functional unit of the body?
    cell
  2. The principal parts of a cell are the:
    plasma membrane, cytoplasm, cellular contents between the plasma membrane and nucleus and the nucleus
  3. What surrounds and contains the cytoplasm of a cell?
    Plasma membrane
  4. What is the membrane composed of?
    proteins and lipids
  5. On the fluid mosaic model, the membrane is a mosaic of proteins that
    float like icebergs in a lipid bilayer sea
  6. The lipid bilayer consists of:
    2 back to back layers of phospholipids, cholesterol and glycolipids
  7. The bilayer arrangements occur because:
    the lipids are amphithatic, having poloar and nonpolar parts
  8. Integral proteins
    extend into or through the lipid bilayer
  9. Peripheral proteins associate with:
    membrane lipids or integral proteins at the inner or outer surface of the membrane
  10. Many integral proteins are glycoproteins, with sugar groups attached to the ends that face the extracellular fluid, together with glycolipids,
    the glycoproteins form a glycocalyx on the extracellular surface of cells
  11. Integral proteins are:
    channels and carriers that help specific solutes across the membrane
  12. Receptors serve as
    cellular recognition sites
  13. Enzymes
    catalyze specific chemical reactions
  14. Linkers (membrane proteins)
    anchor proteins in the plasma membranes to protein filaments inside and outside the cell
  15. Peripheral proteins serve as enzymes and linkers and
    support the plasma membrane, anchor integral proteins.
  16. Membrane glycoproteins function as
    cell identity markers

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