Photosynthesis is a chemical and metabolic process. Photoautotrophs synthesise organic molecules from carbon dioxide and water in presence of light. This process occurs in chloroplasts which contain photosynthetic pigments mainly chlorophyll. This lesson explains from where the raw materials (reactants) are obtained and how the products of photosynthesis are used. The lesson also gives the chemical and word equation of photosynthesis. This lesson is found in resources.