Test for Proteins

Q.

Besides iodine which another chemical is used to test starch?

1. Safranin

2. Methylene blue

3. Eosine

4. HCl

Q. Biuret solution contains sodium hydroxide and ___.

1. tartaric acid
2. iodine
3. copper sulphate
4. sodium chloride

Q.

The blood tastes saltish due to the dissolved

1. Potassium chloride

2. Sodium chloride

3. Ammonium nitrate

4. Sodium nitrate

Q. In the biuret test, the presence of proteins is indicated by colour.

1. red
2. blue
3. blue black
4. purple

Q. Sodium hydroxide and copper sulphate are used to test the presence of in the food.

1. fat
2. protein
3. carbohydrate

Q. In the test for protein, biuret reagent changes colour from blue to ___ in the presence of protein.

1. red
2. yellow
3. green
4. violet

Q.

Which of the following is the common test for protein?

1. Benedict test
2. Biuret test
3. Iodine test
4. Bromine test