BIO 1140 Lecture 3: BIO1140 - Lecture 3
Document Summary
Properties: membrane fluidity**trade off between lipid composition & temperature. The organism will alter the lipid composition to counteract the changes in temperature. Alterations in lipid composition to maintain membrane fluidity at different environmental temperatures. Organisms offset the effects of temperature by manipulating lipid composition. Increase temp = organism will adjust lipid composition to bring fluidity back down to where it should be. Disaccharides enzymes add double bonds to fatty acid chains. As temp goes down you get more disaccharides enzymes that will add double bonds and regulate the fluidity. What the animal eats can affect the membrane fluidity. Very rich in polyunsaturated fatty acids (pufa) or omega-3 fatty acids. They put on fat reserve to be able to fly for 3 days. But there was an increase in double-bonds in their flight muscle membranes. They rely on fatty acids as fuel source. Citrate synthase (part of the citric acid cycle)
