COMPONENTS OF FOOD (POST 4)

April 15, 2020

 Components of Food Post 4A


 Welcome back to our next blog lesson ! During our last class we learnt a few food Tests.


How many of you tried the test for Fats at home.? If you didn't do so I urge you to try


 During today 's lesson we will learn  how to test a food for the presence of Protein and we will also learn about why we need to include Fats and Protein in our diet.



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 TEST FOR PROTEINS  :

•     Take a suspension of the substance to be tested
•     Add a few drops of concentrated Nitric Acid
•     Warm it.
•     A yellow colour indicates the presence of  Protein.
•     Pour away the Nitric Acid.
•     Add a little water and two drops of Ammonium Hydroxide.
•      If the colour changes from yellow to a deep orange it proves the presence of Protein

 





 Watch the following video to see the test: https://www.youtube.com/watch?v=SfW7fCxK0Cc



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 Dietary fats are essential to give your body energy and to support cell growth. They also help protect your organs and help keep your body warm. Fats help your body absorb some nutrients and produce important hormones, too. Your body definitely needs fat.




Nutrient Series: Fats - Nutrition By Mia


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What are Proteins?

Proteins are known as the building blocks of life because they are the most abundant molecules present in the body and form about 60% of the dry weight of cells.


They are the most common cells found in all living organisms. Apart from cells, most of the enzymes, regulatory and structural parts of the body are made up of proteins. As a result, they are essential for the growth and development of an individual.







Food like eggs, pulses, milk and other milk products form the major high protein foods for the body.










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DO THE QUESTIONS GIVEN IN GREEN IN YOUR NOTEBOOK-


Q 8) Write a short note on Proteins.

A) Proteins are made up of Carbon, hydrogen,oxygen   and nitrogen.A protein molecule is made up of smaller units called amino acids.  Proteins are called body Building foods.





Q9 )What role do proteins play in our diet ?

A) Proteins are needed

    for Growth
    for Repair  of worn out cells and tissues
    they help the body to fight infection
    they  help in many bio chemical processes.






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H. W.

     Text in  green is to be written in your note book.
     Learn  the Question and Answers that have been done today.