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Work out the results expected of standard tests used by scientists to identify the presence of specific chemicals which may be found in cells.
Member rating: No Rating | Words: | Submitted: Fri Sep 17 2004
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CHEMICAL TESTS FOR CELLULAR MOLECULES. Experiment Number 1 03-02-04 Partners: Philippa Pretorius and Claire Walter Suzanne Poulgrain AIM: To work out the results expected of standard tests used by scientists to identify the presence of specific chemicals which may be found in cells. A. TEST FOR PROTEIN PROCEDURE: 1. 3mL of egg white solution was placed in a test tube. 2. 1mL each of dilute sodium hydroxide solution and dilute copper sulfate solution was added. 3. The resulting liquid was observed and described in Table 1. 4. Steps 1, 2 and 3 were repeated using water in place of egg white solution. 5. Steps 1, 2 and 3 were repeated using bread, meat and biscuit. All ingredients were tested separately. RESULTS: Table 1 - Results of Protein Testing Colour Original Colour Blue Egg white solution Violet Water Blue Bread Blue Meat Violet Biscuit Blue DISCUSSION / CONCLUSIONS: Protein is an important cell chemical and is constantly needed by the body. As a result of this it is found in many common food stuffs. In this test, water...
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