Below is a list of instructions for an experiment to test different foodstuffs for the presence of starch. Rewrite the instructions as the method for an experiment you have conducted. Equipment required: potassium iodide crystal, bleach solution, plastic sheet, moistened paper towel Suggestions for foodstuffs for testing: pasta, bread, cereal, potatoes, mushrooms, apple, cheese and cooked chicken. a Place a small piece of each of the foods to be tested on the plastic sheet. b Place a small potassium iodide crystal on top of the piece of food. c Add one drop of bleach solution (sodium hypochlorite solution) and allow it to run over both crystal and food. d if an intense blue-black colour is seen, the food contains starch. e Clean the plastic sheet with a moistened paper towel.

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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.