23.1

The Structure of Carbohydrates is made of carbon, hydrogen, and oxygen in a 1:2:1 ratio. __Uses of Carbohydrates__ The uses carbohydrates like [|fuel]

The Structure of Lipids are long non-polar tail and a polar cabonxylic acid functional group at the head.

__Uses of Lipids__
 * **1.** They serve as structural components of biological membranes.
 * **2.** They provide energy reserves, predominantly in the form of triacylglycerols.
 * **3.** Both lipids and lipid derivatives serve as vitamins and hormones.
 * **4.** Lipophilic bile acids aid in lipid solubilization.

__Examples of lipids:__ - Phospholipids - Triglycerides - Compound saponifiable lipids - Nonsaponifiable lipids