Carbohydrates Carbohydrates are organic compounds made of carbon (C), hydrogen (H), and oxygen (O), usually in the ratio of (CH₂O)ₙ. They are polyhydroxy aldehydes, ketones, or substances that yield these upon hydrolysis. Carbohydrates are the main source of energy for living organisms and play structural and storage roles. --- Characteristics Composed of C, H, and O elements. General formula: (CH₂O)ₙ. Most are sweet in taste and soluble in water. --- Types 1. Monosaccharides Simplest sugars wit