BIOLOGY 2B03 Study Guide - Midterm Guide: Gram-Negative Bacteria, Glycoprotein, Monosaccharide
12 Dec 2012
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Organelles must have a membrane for separation (compartments) Membrane is continuous with outer nuclear membrane. Peroxisomes- enzymatic reactions occur inside and are separated by the membrane. Thermodynamically stable (no energy needed to stay together) Fatty acid tails are hydrophobic and polar. Lipid backbone but has lots of proteins and carbs. 3 c sugar alcohol (glycerol) attached to phosphate with polar head group that is charged (choline, serine, ethanolamine, inositol, etc) Fatty acid component- 14-24 c in length, usually 1 is saturated and the other is not (would put a kink in it) Vary in polar head group, degree of saturation, and length. Membranes need to balance fluidity to filter. Fluidity is balanced with fatty acid length (increase length to interact with the one across from it to slow down fluidity) Kinky fatty acids don"t pack as well and increase fluidity (by decreasing saturation) Stress proteins (hsp) that bind to membranes when they are too high, decrease fluidity very quickly.
