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write stages that occur during photosynthesis |
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Answer» Dark reaction and light reaction Photosynthesis: Two StagesWhile the mechanisms of photosynthesis are complex, the overall reaction is as follows: carbon dioxide + sunlight + water --> glucose (sugar) + molecular oxygen (O2). This reaction takes place through several steps which occur during two stages, or phases: the light phase and the dark phase.In the light phase, energy from light, powers reactions that split water to release oxygen. In the process, high energy molecules, called ATP and a reducing agent and NADPH are formed. Actually, it is the the chemical bonds in these compounds that stores the energy. The dark phase is also known as the Calvin Cycle. In this phase, which uses the ATP and NADPH from the light phase, carbcarbon dioxide used to make the sugar, glucose. Oxygen is a byproduct of the reaction. The three events that occur during the process of photosynthesis are:(i) Absorption of light energy by chlorophyll.(ii)\tConversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen.\t(iii)\tReduction of carbon dioxide to carbohydrates. Light dependent phase and light independent phase |
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