#biology #biologyteacher #biologystudent #biologynotes #Olevels #olevel #combinedscience #sciencebiology #sciencenotes #sciencesg #biologysg #olevelbiology #foodtests #gceolevel #olevelstudent #thebiologyjotterbook. Math- Test of Volume and Surface Area(of sphere). 2) Add 5cm3 of copper sulphate and 5cm3 of sodium hydroxide into the test tube using a pipette. Distilled water was used instead of a solution to repeat this process as a control. Equipment. Use tab to navigate through the menu items. Carbohydrates, fats and proteins are often large molecules that can be broken down into smaller molecules. This is called the biuret test. IBO was not involved in the production of, and does not endorse, the resources created by Save My Exams. 1. Ruth graduated from Sheffield University with a degree in Biology and went on to teach Science in London whilst also completing an MA in innovation in Education. Whilst carrying out this practical you should try to identify the main hazards and be thinking of ways to reduce harm: Biuret solution contains copper (II) sulfate which is dangerous particularly if it gets in the eyes, so always wear goggles, Iodine is also an irritant to eyes (wear goggles), Sodium hydroxide in biuret solution is corrosive, if any chemicals get onto your skin wash hands immediately, Ethanol is highly flammable; keep it away from the Bunsen burner used in the Benedicts test (you should turn the Bunsen off completely). We repeated the following steps with our potato food solution and turnip food solution instead of the distilled water and starch. Your email address will not be published. At-home food sensitivity testing kits usually require a person to submit a sample, which could be: blood from a skin prick test. Ask me if you need help for GCSE revision? //
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