Question

How will you determine whether the given
Food items contain protein or mot?​

Answer 1

Answer:

Following steps are used to test if a food item contains protein. 

1) Take a small quantity of the food items to be tested.

2) Grind/mash the food item.

3) Put the food item into a test tube.

4) Add 10 drops of water and shake the test tube.

5) Add two drops of copper sulphate solution to the test tube, using a dropper. 

6) Add 10 drops of caustic soda solution using a dropper and shake the test tube.

7) Let the test tube rest in a test tube stand for a few minutes.

8) Observe the colour of the mixture.

9) Violet colour indicates the presence of proteins in the tested food item.

Answer 2

Answer:

Here is your answer

Step-by-step explanation:

There are a number of tests that can be performed to confirm presence of protein in a food item.

Test 1 (HEAT TEST):

Take small amount of sample and make an aqueous solution in a test tube.

Heat the upper part of the test tube. The lower part acts as control.

The upper part shows cloudy turbidity. Hence protein is present.

BIURET TEST:

Take the sample solution and mix BIURET REAGENT to the test tube.

Appearance of purple colour of solution indicates and confirms presence of proteins.

Blue colour of solution indicates absence of proteins.