Interior to the chloroplast's inner membrane and surrounding the thylakoids is a fluid called the stroma. The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose. The chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs.
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Interior to the chloroplast's inner membrane and surrounding the thylakoids is a fluid called the stroma. The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose. The chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs.