The number of chloroplast varies from one to many person cells. The shape of chloroplast also varies greatly. Each chloroplast consists of outer limiting membrane and inner matrix called stroma. There are 40-60 grana present in stroma. Each granum contains 10-100 thylakoids, which are concerned in light reaction of reaction of photosynthesis as they contain quantosomes in their inner face and enzymes of electron transport chain and ATP synthesis.