Biomolecules:Lipids and Their Metabolism Lipids are naturally occurring organic molecules isolated from organisms by extraction with nonpolar organic solvents Fats,oils,waxes,some vitamins and hormones,and most nonprotein cell-membrane components Lipids have limited solubility in water Lipids defined by their physical property (solubility)and not by their structure Lipids are naturally occurring organic molecules isolated from organisms by extraction with nonpolar organic solvents ▪ Fats, oils, waxes, some vitamins and hormones, and most nonprotein cell-membrane components ▪ Lipids have limited solubility in water ▪ Lipids defined by their physical property (solubility) and not by their structure Biomolecules: Lipids and Their Metabolism