Photosynthesis involves the synthesis of organic food items from inorganic substances such as carbon dioxide, and water with the help of chlorophyll in the presence of sunlight.
Sunlight
Photosynthesis process takes place in presence of sunlight which is the main source of energy.
This light energy is converted to chemical energy by chlorophyll.
This chemical energy is required for the dark reaction that involves the synthesis of glucose.
Chlorophyll
Chlorophyll is green pigments present on leaves that help with the trapping of light and converting it into chemical energy.
Water
The oxygen liberated during photosynthesis is a result of the hydrolysis of the water molecules.
Carbon dioxide
Carbon dioxide is absorbed by plants that are fixed by the rubisco enzyme present in the stroma into glucose.
This reaction occurs during the dark reaction, in the absence of sunlight.