1.3 IB Bio Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Term | Definition |
Fluid Mosaic Model | N/A |
Davson-Denielli Model | -Cell membranes consist of a phospholipid bilayer coated in protein -Explained how a 10nm thick membrane could be an effective barrier against substances -Two dark bands with lighter band in between -Proteins dark in electron micrograph |
Freeze etched electron micro graphs | -Rapid freezing and fracturing of cells, occurs in weak regions (occurred through middle of membrane) |
Structure of membrane proteins | -Structure of membrane proteins; are varied and globular in shape (not likely to form a continuous layer) -Some proteins have hydrophobic sections, they are attracted to hydrocarbon tails in center of membrane |
Fluorescent antibody tagging | -Antibodies will attach to particular proteins -Antibodies are fluorescently labeled green or red -One cell labeled green and another red (fused together with electric discharge) -After time red and green were evenly distributed throughout larger cell |
Phospholipids form bilayers | -Hydrophobic fatty acid tails repel water and are attracted to each other -Hydrophilic phosphate heads attract water and orient to face water (extra and intracellular fluid) |
Membrane protein diversity | -Parts of proteins that face outside the membrane (into the cell or towards the extra cellular fluid) are polar -Parts of proteins that face the hydrocarbon are non-polar -Some proteins will be associated with polysaccharides (glycoproteins/antlers) |
Hormone binding sites | -Immobilized enzymes -Cell adhesion -Cell to cell communication -Channels for passive transport -Pumps for active transport |
Cholesterol in animal cell membranes and mammalian membranes | -Reduces membrane fluidity by reducing phospholipid movement at moderate temps but it also hinders solidification at low temps -Also helps prevent some ions such as sodium from crossing the membrane because it is hydrophobic |
Created by:
averyschwarz
Popular Biology sets