Simple carbohydrates, also referred to as sugars, include monosaccharides and disaccharides. monosaccharides consist of a single sugar molecule, and disaccharides consist of two molecules of sugar joined together. complex carbohydrates are larger molecules with many sugar molecules. choose the correct statement about simple or complex carbohydrates. a) lactose is a five-carbon monosaccharide found in ribonucleic acid (rna). b) sucrose is composed of one glucose molecule and one maltose molecule. c) glucose, fructose, and galactose each contain 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. d) carbohydrates contain carbon, hydrogen, and nitrogen. e) oligosaccharides and polysaccharides are classified as simple carbohydrates.