Question

explain in detail how you would test a gingerbread biscuit solution for the presence of starch, sugar, protein and lipids?

Answer 1

To test a gingerbread biscuit solution for the presence of starch, sugar, protein, and lipids, you can perform several tests using different solutions and substances. These tests include adding iodine solution for starch, Benedict's solution and heat for sugar, Biuret solution for protein, and spreading the biscuit on brown wrapping paper for lipids.

Step-by-step explanation:

To test a gingerbread biscuit solution for the presence of starch, sugar, protein, and lipids, you can follow these steps:

1. Put some of the gingerbread biscuit solution into a test tube.
2. Add a few drops of iodine solution to the test tube to test for the presence of starch. If the solution turns blue-black, then starch is present.
3. Pour some Benedict's solution into another test tube and add the gingerbread biscuit solution to it. Heat the mixture in a water bath for about 3 minutes. If the solution changes from blue to green, yellow, or brick red, then sugar is present in the gingerbread biscuit solution.
4. Put some of the gingerbread biscuit solution into a third test tube and add a few drops of Biuret solution. If the solution turns from blue to purple, then protein is present.
5. Take a small amount of gingerbread biscuit and spread it on a piece of brown wrapping paper. If a stain is left on the paper, then lipids are present in the gingerbread biscuit.