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23 June, 05:08

Explain in detail how you would test the gingerbread biscuit solution for the presence of starch sugar and protein

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  1. 23 June, 05:14
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    In order to test a gingerbread biscuit solution for the presence of starch sugar you should do a chemical test. Starch is not sweet and does not dissolve well in water.

    A chemical test for starch includes adding iodine solution (red) and see if it turns blue/black in colour.

    Testing proteins on the other hand includes adding Biuret reagent. This turns a mauve or purple colour when mixed with protein.
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