e. both a and c
Work Step by Step
Monosaccharides (one sugar) are the simplest type of carbohydrate. Common monosaccharides have a backbone of five or six carbon atoms, one carbonyl group (-C=O), and two or more hydroxyl groups (-OH). Ribose (C5H10O5) and glucose (C6H12O6) are simple sugars (monosaccharides).