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level: Animal organisation - digestion

Questions and Answers List

level questions: Animal organisation - digestion

QuestionAnswer
How can I test for reducing sugars?1)Place 5cm^3 food sample in test tube in 75c waterbath 2)Add 10 drops benidict soloution and leave 5 mins pointing away from you 3)Ascending sugar - Blue - Green - Orange - Brick Red
How can i test for starch?1)Place 5cm^3 in test tube 2)Add a few drops of iodine soloutuion gently shake 3)Brown/Orange (remains if no starch) to Blue black
How can i test for protiens?1)Place 2cm^3 in test tube 2)Add 2cm^3 biurett solution - gently shake 3)Blue (remains if no protien) to purple
How can I test for lipids?1)Prepare 5cm (dont need to filter) test tube 2)Add 3 drops sudan III stain soloution gently shake 3)Red seperate layer will form.