Testing for Biological Molecules 0.0 / 5 ? BiologyPhotosynthesis and transpirationGCSEOCR Created by: A-haCreated on: 17-03-19 11:39 Test for Reducing sugars Benedict's reagent 1 of 20 Test for non-reducing sugars Benedict's reagent 2 of 20 Test for starch Iodine 3 of 20 Test for lipids (fats) Emulsion test (ethanol) 4 of 20 Test for proteins Biuret Test 5 of 20 Positive colour for Reducing sugars Brick red 6 of 20 Positive colour for Non Reducing sygars Brick red 7 of 20 Positive colour for Strach Blue-Black 8 of 20 Positive colour for Lipids (fats) Cloudy-white 9 of 20 Positive colour for Proteins Purple 10 of 20 Negative colour for Reducing sugars Blue 11 of 20 Negative colour for Non Reducing suagrs Blue 12 of 20 Negative colour for Starch Browny-orange 13 of 20 Negative colour for Lipids (fats) Colourless 14 of 20 Negative colour for Proteins Blue 15 of 20 Method to test for Reducing sugars 1) Add Benedict's reagent to a sample 2) Heat in a water beath set to 75°C 3) obsreve colour change 16 of 20 Method to test for Non Reducing suagrs 1) Add hydrochloric acid to sample 2) Boil the solution 3)Add sodium hydroxide 4) do the reducing suagr test 17 of 20 Method to test for Starch 1) Add iodine to sample 2) observe colour change 18 of 20 Method to test for Lipids (fats) 1) Add ethanol to sample 2) Shake for 1 minute 3) Pour solution into water 19 of 20 Method to test for Proteins 1) Add some sodium hydroxide to the sam[ple to make the solution alkaline 2) Add some copper(II) sulfate solution 20 of 20
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