starch production

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starch production

Post by abc123 » Thu Apr 19, 2007 9:06 pm

i need to clarify a few things for some coursework, if a leaf disc was put in to a solution of glucose, will it directly be able to use the glucose to produce the starch, or is the glucose repsired to produce ATP for photosynthesis so that glucose can be produced then converted to starch.
Also how could oyu measure the rate of starch production, could you add iodine and measure time taken to change black colour, or could you measure time taken for discs to float when in the glucose solution?
any help much appreciated

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Post by MrMistery » Sat Apr 21, 2007 7:12 pm

the plant can make starch directly from glucose, by converting it to glyceraldehide-3-phosphate and then importing it into the chloroplast, where starch is synthetised. No idea how to measure, but iodine is a good guess.
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