Food testing 0.0 / 5 ? BiologyEnzymes and digestionGCSEAQA Created by: sadiaaaaa8Created on: 05-06-18 21:04 How would you test a substance to see if it contains carbohydrates (sugar)? Add a few drops of Benedicts solution. In the presence of sugar it will go from blue to orange. 1 of 5 How would you test a substance to see if it contains starch? Add a few drops of iodine solution. In the presence of starch it will go from browny orange to blue/black. 2 of 5 How would you test a substance to see if it contains protein? The biuret test will turn the solution from blue to pink/purple in the presence of protein. 3 of 5 How would you test a substance to see if it contains lipase? The Sudan III test will form two separate layers, with a red top layer, if lipids are present. 4 of 5 How would you prepare a food sample? Use a pestle and mortar to break a piece of food 5 of 5
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