Question

1) How will you determine whether the given food items contain protein or not?​

Answer 1

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.

$\star$ Hope It Helps.