7. Carbohydrates: What is a carbohydrate? What is the general formula for a carbohydrate? What is a monosaccharide? Give examples. How do living things use monosaccharides? What is an oligosaccharide (disaccharide?) Give examples. How do living things use disaccharides? What is a polysaccharide? Give examples. How do living things use polysaccharides?