AEBI 120 Lecture Notes - Lecture 2: Covalent Bond, Condensation Reaction, Galactose

• School: McGill University
• Department: Biology
• Course: AEBI 120
• Professor: Gary Brian Dunphy

Document Summary

Carbohydrates: contain c,h, o at 1:2:1 ratio (ch2o uniform formula, water soluble. Lactose (polymerization of glucose + galactose) in milk. Starch, glycogen & cellulose differ in positions + orientations of their glycosidic linkages. i. e. cellulose (plants) structures the plant cell wall starch (plants) used for storage in plants. Glycogen (animals+ fungi) storage in muscle + liver cells. Chitin (animals + fungi) found in arthropods to build exoskeleton (= hard case that surrounds soft parts. Types of lipids: simple lipids, complex/compound lipids, steroids/sterols, waxes. Simple lipids: fatty acids - mostly in animals, or seeds. Saturated fa: c c single bond, unsaturated fa, c c double/triple bonds, triglycerides, composed of glycerol + 3 fa, condensation reaction. Lipid feet hydrophobic: cell membrane structure = phospholipid bilayer (2 layers of phospholipids) Proteins: composed of amino acids (aa, aa bond together w/ a peptite bond, about 500 aa present, but only 20 protein present. Radical group changes depending on amino acid.