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starch synthesis

Asked by ellemitch | May 17, 2007 | A Level > Biology > Coursework
ellemitch
ellemitch asks:

hey, i just need to know how starch is made from sugar, like what the plant actually does to turn it into starch and also how can use measure the rate of starch synthesis, is it possible??!!
thanks

etutor answers:
Starch is composed of glucose units and the plant can manufacture the starch direct from glucose. To measure starch synthesis, you need to take extracts of the reaction mixture and test using iodine, noting the time taken for a positive reaction to occur. This can be quite tricky as the first sign of a postive is the appearance of blue-black grains, rather than the whole mixture going blue-black

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eleanor
eleanor
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