Photosynthesis

Photosynthesis is a very crucial and vital process. It is a process in which sunlight is converted into chemical energy. This process occurs in almost all plants and also some algae. Plants use light energy, carbon dioxide, and water to make sugar (glucose). Photosynthesis takes place in the mesophyll cells of the leaves, as these have chloroplasts which are organelles that contains a high concentration of the photosynthetic pigment chlorophyll. 

There are two stages of photosynthesis, the Light Dependent Reaction and the Light Independent Reaction. The Light Dependent Reaction occurs in the thylakoid membranes of the cholorplast and this provides a large surface area for the attachment of chlorophyll, electron carriers and enzymes. The function of this reaction is to produce reduced NADP, ATP and oxygen for the plant to be able to use in other processes. The Light Independent Reaction, also known as the Calvin cycle, occurs in the stroma of the chloroplast because it contains all the enzymes needed to carry out the reaction. This reaction reduces carbon dioxide to make sugars and other organic molecules .