BCH210H1 Study Guide - Midterm Guide: Lipid Bilayer, Trans Fat, Cholic Acid

• School: UTSG
• Department: Biochemistry
• Course: BCH210H1
• Professor: Stavroula Andreopoulos

Document Summary

Phospholipd bilayer: the basis of a biological membrane, made up of lipids, proteins and sugars. Composed of a hydrocarbon tail (hydrophobic) and an alcohol head (hydrophilic) Head is able to lose/gain a proton because of its negative charge. Saturated made up of all single bonds (e. g. palmitate, 16:0) Allows for very tight packing, have stronger interactions that hold them together (van der. Unsaturated contains at least one double bond (e. g. oleate, 18:1) Double bonds in nature tend to be in cis orientation; trans fatty acids are very rare in nature. Does not pack together closely, double bonds produce kinks" in the chain; changes physical properties. Can be polyunsaturated: multiple double bonds (e. g. linoleate 18:2) The last carbon in the tail is referred to as the omega carbon; double bonds get their name according to this carbon. E. g. omega 3 fatty acid: double bond is on the third carbon from the end.