Human Nutrition 0.0 / 5 ? BiologyEnzymes and digestionIGCSEEdexcel Created by: Eeshan GangwaniCreated on: 10-09-16 18:19 Carbohydrates Made up of simple sugars Contain carbon, hydrogen and oxygen Starch and glycogen are large complex carbohydrates which are made up of smaller units of glucose or maltose molecules in a long chain. 1 of 5 Proteins Made up of Amino acids Contain carbon, nitrogen hydrogen and oxygen otems. 2 of 5 Lipids Lipids made up of fatty acids and glycerol Lipids contain carbon, hydrogen and oxygen atoms. 3 of 5 How to test for Glucose? Add Benedict's Reagent to a sample and heat it. If it's positive, it'll go from BLUE to GREEN to YELLOW to ORANGE to BRICK RED. The higher the concentration of glucose, the further the colour change goes - used to compare glucose in different solutions. 4 of 5 How to test for Starch? Add iodine to test. If starch is present, it'll go from browny-orange to a dark blue-black colour. If there's no starch, it'll stay browny-orange. 5 of 5
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