AP Bio Extra Credit #2

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Across
  1. 2. A channel protein in a cellular membrane that specifically facilitates osmosis, the diffusion of free water across the membrane
  2. 5. A property of biological membrances that allows them to regulate the passage of substances across them
  3. 7. A protein loosely bound to the surface of a membrane or to part of an integral protein and not embedded in the lipid bilayer
  4. 8. Having both a hydrophilic region and a hydrophobic region
  5. 9. The random thermal motion of particles of liquids, gases, or solids.
  6. 10. A lipid with one or more covalently attached carbohydrates
Down
  1. 1. A transmembrane protein that helps a certain substance or class of closely related substances to cross the membrane
  2. 3. A transmembrane protein with hydrophobic regions that extend into and often completely span the hydrophobic interior of the membrane and with hydrophilic regions in contact with the aqeous solution on one or both sides of the membrane (or lining the channel in the case of a channel protein)
  3. 4. A protein with one or more covalently attached carbohydrates
  4. 6. The currently accepted model of cell membrane structure, which envisions the membrane as a mosaic of protein molecules drifting laterally in a fluid bilayer of phospholipids