Photosynthesis is the process by which plants make carbohydrates from raw materials, using energy from light. During photosynthesis:
- light energy is absorbed by chlorophyll - a green substance found in chloroplasts in the palisade cells in the leaf
- absorbed light energy is used to convert carbon dioxide (from the air) and water (from the soil) into a sugar called glucose
- oxygen is released as a by-product
These equations summarise what happens in photosynthesis.
Some glucose is used for respiration, while some is converted into insoluble starch for storage. The stored starch can later be turned back into glucose and used in respiration.