BIOLOGY 1A03- Final Exam Guide - Comprehensive Notes for the exam ( 87 pages long!)

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29 Mar 2018
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BIOLOGY 1A03 Full Course Notes
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BIOLOGY 1A03 Full Course Notes
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Theme 1- module 1- structure of the cell. 4 cell macromolecules: nucleic acids (dna & rna, proteins (perform metabolic activities and movement, polysaccharides, phospholipids. Separate the internal environment from the external environment. Cell membranes are thin and fluid, not rigid. Saturated (single bonds), unsaturated (double bonds), affects fluidity of membrane. Water molecules react with the hydrophilic head regions. Phospholipids form lipid micelles- important for fat soluble vitamins. Lipids cannot easily flip from one side of layer to the other. Factors affecting fluidity: unsaturated or saturated fatty acids (tightly packed, number of carbons in the fatty acid tails, temperature, presence or absence of cholesterol. Lipid raft- non-fluid area containing proteins, receptors, etc. Gfp video* determine the fluidity of the phospholipid bilayer by tagging proteins with fluorescent gfp proteins. A less fluid membrane has a lower permeability compared to a high fluid membrane. Small hydrophobic molecules can cross membrane through concentration gradient (diffusion)

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