Name and describe each of the tests used to test for the presence of :starch, lipids and proteins.
Starch- add iodine to the sample. A positive result will give a blue/black solution.Lipids- Add ethanol to the sample and shake well then add water. A positive result indicating the presence of a lipid will give a white cloudy emulsion.Protein- The Biuert test is used to test for the presence of protein in a sample. Add sodium hydroxide (NaOH) followed by copper sulphate solution (CuSO4). If protein is present in the sample, the solution turns from blue to purple.
AT
Related Biology GCSE answers
All answers ▸Complete the following equation which summarises the process of photosynthesis and write the equivalent word equation below your answer …..CO… + 6 ……… --> C………… + 6 ….
What is meant by the term enzyme specificity?
How can we isolate DNA from cells?
Give 3 ways in which aerobic respiration differs from anaerobic respiration in muscles.