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Spectrophotometer and Phosphate Buffer

hyebeh
in Biology

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Why do you need a phosphate buffer when you run chloroplasts through a spectrophotometer to test for photosynthesis? Is it because the phosphate allows the chloroplasts to form ATP from ADP (in other words, providing the reducing agent)?

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i think i answered my own question. I believe that the phosphate buffer is used to maintain a constant pH (that's what buffers are for! lol)

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