Final answer:
To determine the presence of biomolecules in an unknown food sample, you can perform specific tests for lipids, proteins, glucose, and starch. The tests include Sudan IV test for lipids, Biuret test for proteins, Benedict's test for glucose, and iodine test for starch.
Step-by-step explanation:
To determine the presence of biomolecules in an unknown food sample, you can use specific tests for lipids, proteins, glucose, and starch. Here are the tests you can perform:
a. Lipids: You can perform a Sudan IV test, which involves adding Sudan IV solution to the food sample. If the sample turns red, it indicates the presence of lipids.
b. Proteins: You can perform a Biuret test, which involves adding Biuret reagent to the food sample. If the sample turns violet, it indicates the presence of proteins.
c. Glucose: You can perform a Benedict's test, which involves adding Benedict's reagent to the food sample and heating it. If the sample turns orange or red, it indicates the presence of glucose.
d. Starch: You can perform an iodine test, which involves adding iodine solution to the food sample. If the sample turns blue-black, it indicates the presence of starch.