Which of the following statements best describes the structure and function of a carbohydrate? Carbohydrates are large molecules made up of monosaccharides and are used by organisms for energy storage. Carbohydrates are made up of starchy monomers and are used for structure, protection, and reproduction. Carbohydrates are long, winding molecules made up of amino acids and are important in the synthesis of fats and hormones. Carbohydrates are made up of sucrose molecules that are important for transportation and protein synthesis.