Carbohydrates Synthesized by plants using sunlight to convert CO2 and H2O to glucose and O2. Polymers include starch and cellulose. -Starch is a storage unit for solar energy. Most sugars have formula C(H2O)n, “hydrate of carbon." Chapter 23 2Chapter 23 2 Carbohydrates ▪ Synthesized by plants using sunlight to convert CO2 and H2O to glucose and O2 . ▪ Polymers include starch and cellulose. ▪ Starch is a storage unit for solar energy. ▪ Most sugars have formula Cn (H2O)n , “hydrate of carbon