Waxes,Fats,and Oils Fats and oils are triglycerides,or triacylglycerols Triesters of glycerol with three long-chain carboxylic acids called fatty acids Fats are used by animals for long-term energy storage Less highly oxidized than carbohydrates Provide about six times as much energy as an equal weight of glycogen Fatty acyl Glycerol 0 Stearoyl (stearic acid) CH2OCCH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH3 0 Oleoyl (oleic acid) CHOCCH2CH2CH2CH2CH2CH2CH2CH=CHCH2CH2CH2CH2CH2CH2CH2CH3 Linoleoyl (linoleic acid) CH2OCCH2CH2CH2CH2CH2CH2CH2CH-CHCH2CH-CHCH2CH2CH2CH2CH3 A triacylglycerol ▪ Fats and oils are triglycerides, or triacylglycerols ▪ Triesters of glycerol with three long-chain carboxylic acids called fatty acids ▪ Fats are used by animals for long-term energy storage ▪ Less highly oxidized than carbohydrates ▪ Provide about six times as much energy as an equal weight of glycogen Waxes, Fats, and Oils