food

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  • food
    • carbohydrates
      • 1.starch (to test for starch ,use iodine solution ,if colour change from orange , to  blue black  ,starch is present
      • glucose (to test for glucose ,use benedict reagent ,if the colour of the reag change ,. glucose is present
    • proteins
      • to test for the present of proteins ,use biuret's reagent .if the colourr of the reagent changes to violet ,protein is present
    • fats
      • filter paper experiment . a grease spot can be seen if fats are presen
      • alcohol test
    • minerals
      • they are inorganic salts which do not provide energy  but are indispensable to bodily functions
      • calcium ,phosphorus ,sodium chlorine phosphorus iron
    • vitamins
      • not energy-providing food nor boby building food
      • for maintaining normal health and development
      • lack of vitamin =        diseases such as  scurvy and rickets
    • fibres or roughage
      • indigestible fibrous material eg cellulose,present in the diet
      • provides bulk to the intestinal contents and helps peristalsis
      • insufficient of fibreww cause constipation
    • water
      • essential constituent of protoplasm

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