a) Light dependent reaction: Chlorophyll, a pigment in the thylakoids absorbs light. The absorption of light splits water into oxygen and protons. The oxygen is released in the atmosphere while the protons are pumped through number of proteins to produce ATP and NADPH.
b) Light independent reaction: ATP and NADPH produced in light dependent reaction is used in the dark reaction through Calvin cycle to produce carbohydrates. The enzymes for the dark reaction of photosynthesis are present in the stroma of chloroplast.
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