level: Animal organisation - digestion
Questions and Answers List
level questions: Animal organisation - digestion
| Question | Answer |
|---|---|
| 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. |