MATERIALS: Potato Thermometer Test Tubes Bunsen burner and tripod set up Distilled water 0.1% Catechol solution (in amber bottle) Cheesecloth Beakers Dropper Blender PROCEDURE: 1. Cut potato. Blend 15g in 100ml distilled water. 2. Filter through cheesecloth. 3. Collect filtrate. Divide into 2 lots. 4. Boil 1 Lot for 3 minutes (Lot A). Leave the other Lot unheated (Lot B). 5. Fill each of three test tubes % full (3ml) of distilled water. 6. Add 10 drops of catechol to each tube. 7. Add 10 drops of heated potato extract (Lot A) to 1 test tube. Mix. 8. Add 10 drops of unheated potato extract (Lot B) to another test tube. Mix. 9. Add 10 drops of distilled water (Control) to the third test tube. Mix. 10. Note and record color of each tube at 1-minute intervals for 5 to 10 minutes.

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Essential nutrients

These are the organic compounds present in the food that provide nourishment essential for the development and growth of our body. Nutrients not only provide us with the required energy to carry out various biological processes but are also the building blocks for repair and growth in our bodies.

Vitamins

The vitamins are organic molecules required in low concentration for the proper functioning of the body. They cannot be generated in the organism and are taken into the body through the diet. The lack of proper vitamins results in diverse deficiency disorders. They are thus called essential nutrients. The important vitamins are vitamin A, vitamin B complex, vitamin C, vitamin D, vitamin K, and vitamin E.