Photosynthesis is an endothermic reaction that takes place in the chloroplasts of plant cells. It uses light energy to convert carbon dioxide and water into glucose and oxygen.
Word equation: Carbon dioxide + Water → Glucose + Oxygen
Balanced symbol equation: 6CO2 + 6H2O → C6H12O6 + 6O2
The glucose produced is used for: respiration (energy), making cellulose (cell walls), making amino acids (proteins, with nitrate ions), stored as starch or fats/oils.