GEOG 2051 Chapter : 15 MassMovementI 1
Document Summary
Biological molecules: most biological molecules are carbon -based, organic molecules = c + h, carbon has 4 outer (valence) electrons, can form up to 4 bonds. Reactions: dehydration (condensation) - removes water during reaction to synthesize larger molecule, hydrolysis - water is used to break molecule apart into small molecules. Carbohydrates: composition, carbon + water, formula = (ch2o)n, functions, structure, energy, monomer: monosaccaraide (immediate, polymer: polysaccharaide (long term) Important polysaccharides: cellulose - makes up plant cell walls, chitin - makes up insect exoskeletons and fungus cell walls, has functional group that contains nitrogen. Lipids: nonpolar and hydrophobic, mostly c and h, monomer: fatty acid, soap both polar and nonpolar dissolves nonpolar substance and reacts with polar substance. 2 fatty acids, glycerol, and a phosphate group (polar head group) polar heads and glycerol are hydrophilic fatty acids are hydrophobic. 3 fatty acids and a glycerol saturated (no c=c) solid and rt unsaturated (c=c) liquid at rt.
