Saved Bookmarks
| 1. |
How can you test the presence of proteins in the given food sample? |
|
Answer» Aim : To confirm the presence of proteins in the given food sample. What yon need: (1) 2% Copper suiphate solution (dissolve 2g Copper sulphate in 100 m/water) (2) 10% Sodium hydroxide solution (dissolve lOg Sodium hydroxide in 100 ml water ), egg (3) Test tubes (4) Two Beakers (5) Dropper. How to do: Make the given food sample into paste (if it is a solid). Take some food sample in a test tube. Add two drops of copper sulphate and ten drops of sodium hydroxide solution. Shake well and keep the test tube in a stand for few 7 minutes. Ob-serve for any change in the colour of the material. If the colour of the materia! turns violet, it contains protein. What you see : The food sample turns into violet colour. What you learn : Proteins are present in food sample. |
|