Test 1: Starch test Test 2: Benedict’s exam for Reducing sugars Observation (Final color change) Interpretation No color modify (Blue) No reducing sugars present Green Trace amounts of reducing sugars present Yellow Low amounts of reducing sugars present Orange Moderate amounts of reducing sugars present Brick-red Large amounts of reducing sugars present Test three Emulsion (Ethanol test) for Fat Test 4: Biuret Test for Proteins Additional source: Brilliant Biology Student