The process by which green plants make their own food in presence of sunlight, chlorophyll and water is known as photosynthesis. Chlorophyll the green coloured pigment present in plant is responsible for performing photosynthesis because it has the ability to absorb sunlight and convert it into food.
The three main steps of Mechanism of photosynthesis are :
1.conversion of light energy into chemical energy and spliting water molecules into hydrogen and oxygen.
2. reduction of carbon dioxide to carbohydrates.
3. Formation of ATP and NADPH₂ .