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.

Answered by Annabel T. Biology tutor

13288 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What is the difference between anaerobic respiration and aerobic respiration?


Describe how the sperm cell is adapted to its function.


What is the equation for aerobic respiration in humans?


Arteries carry blood away from the heart whereas/or veins carry blood towards the heart.M2: Arteries have much thicker walls than veins (due to the thicker muscle and elastic layers) M3: Veins tend to have valves (this prevents backflow)


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences