BioChemical Food Tests

Question 1

What is the chemical test for Starch

Answer 1

Add Iodine solution directly to the substance to be tested (in solid or liquid form) and look for a colour change. Turns blue-black if starch is present

Question 2

What is the chemical test for Lipids (fats)?

Answer 2

Add ethanol to the solution to be tested and shake thoroughly, then add water and look for a colour change. It will turn cloudy if lipids are present

Question 3

What is the chemical test for Glucose (sugar)

Answer 3

Add benedict’s solution to the solution to be tested. Heat for 2 mins in a water bath at boiling point and look for a colour change. Turns brick red with lots of glucose present and turns green/yellow/orange if there is very little glucose present

Question 4

What is the chemical test for protein

Answer 4

Add biuret’s to the solution to be tested and look for a colour change. Turns purple if protein is present

Question 5

What is glycogen?

Answer 5

Source of energy stored in animals

Question 6

What is starch?

Answer 6

Source of energy stored in plants