describe light reaction in detail

Asked by  | 6th Jun, 2008, 07:46: PM

Expert Answer:

Light reaction is the first stage of photosynthesis. It is an energy trapping and photochemical reaction which takes place in the grana of chloroplasts in presence of light. It results in the formation of ATP and NADPH2. During this reaction, chlorophyll-a absorbs light energy and gets excited, thereby releasing an energy rich electron, leaving it ionised. This electron passes through a series of electron acceptors and ATP is formed in the process. There are 2 pathways of electron transfer called cyclic electron transfer and non-cyclic electron transfer.

Answered by  | 11th Jun, 2008, 10:43: AM

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