BIOL 2020 Lecture Notes - Lipid Bilayer, Glycerol, Amphiphile
26 Nov 2012
School
Department
Course
Professor
Document Summary
A small chain of 3-10 monomers covalently attached to lipids and proteins. Are found near the surface of the cell. They"re like a cell"s id tag: polysaccharides. Many different polysaccharides can be formed with the same sugars, but using different bonds. Carbs, proteins and nucleic acids start as monomers and combine into polymers. Lipids: soluble in certain organic solvents, not soluble in water, fats. Composed of three fatty acid tails bound to a glycerol moiety via ester bonds. Kinks in fatty acid tails are c=o. The rest of the cholesterol is hydrophobic. This causes molecules of cholesterol to clump together: phospholipids. Composed of glycerol moiety with two fatty acid tails, a phosphate group, bound to a polar head group. Fatty acid tails hydrophobic, the rest is hydrophilic. Are the basic building blocks of cells. Alpha carbon bound to: carboxyl group, amino group, r group (side chain, hydrogen. Types of r groups: polar charged.
