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In this post we will look into some important differences between these two vital aspects which are essential for synthesis of food in Plants and some other organisms.
|Difference||Light Reaction||Dark or Calvin Cycle|
|Place of occurrence||Thylakoid membrane of chloroplast||Stroma of Chloroplast|
|Requirement of Light||Sunlight is essential||Do Not require sunlight, but takes place mostly during the day.|
|Process||Pigments absorbs of light energy from sun and converts into chemical energy||Involves fixation of CO2 to form Glucose.|
|ATP and NADPH||Produced||Utilized (That was produced during light phase)|
|Order||First phase of photosynthesis||Second phase ( follows light reactions)|
|Water – (Photolysis)||split into Hydrogen ions and Oxygen||No splitting of water observed|
|End products||ATP, NADPH and Oxygen||Glucose|
Image Credit – Openstax biology.