Carbohydrates Synthesized by plants using sunlight to convert CO2 and H2O to glucose and O2. Polymers include starch and cellulose. Starch is storage unit for solar energy. Most sugars have formula C(H2O)n, “hydrate of carbon.” 二> 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 storage unit for solar energy. • Most sugars have formula Cn (H2O)n , “hydrate of carbon.” =>