In our Year 9 Biology lesson this Thursday, we conducted a very interesting practical to test different foods to see what biological molecules they contain. It was very captivating to see the different changes in colours and properties when the foods and solutions reacted. We used foods such as tofu, oil, bread, biscuits, and cheese to test for starch, using iodine solution, reducing sugars using Benedict’s reagent and protein using Biuret reagent.

We were investigating the reactions and the extent to which they occurred, identifying whether the solutions had lots of the substance or small amounts. We were able to find out about all the different molecules that are in the foods we consume regularly, as well as improving our knowledge of biomolecules in a fascinating way.

Luella Gee and Georgia Sherman, Year 9