Carbohydrates


 
 
Concept Explanation
 

Carbohydrates

Carbohydrates in Food: They provide energy to your body, which keeps it going throughout the day. There are two major types of carbohydrates in food:

  • a) Sugar: Sugar is also called simple carbohydrate. It has a sweet taste. Fruits, honey, and table sugar, sugarcane are some sources of sugar.
  • b) Starch: Starch is also called complex carbohydrate. It is tasteless, colourless and white powder. Plants store energy in the form of starch. Rice, wheat, corn, potato and bread are sources of starch.
  • When we eat plant products containing sugar and starch, our digestive system breaks them down into glucose. This glucose is the simplest form of sugar which is absorbed into the blood and provides us energy.

    Test for presence of Starch on food: The main carbohydrates found in our food are in the form of starch and sugars. We can easily test if a food item contains starch.  

  • Take small quantity of the food items to be tested.
  • Put 2-3 drops of iodine solution on it.
  • Observe the colour of the food item.
  • Blue-black colour indicates the presence of starch in the tested food item.
  •                    

    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    The food items shown in the figure are sources of mainly ________________________.

    Right Option : A
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    Explanation
    Question : 2

    Iodine solution changes the colour of starch into pink.

    Right Option : B
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    Question : 3

    Carbohydrates are of great importance. they are usually sweet in nature except some. They are easily found in our food in the form of sugar,starch,cellulose,etc. from the option,given below opt the correct combinations of carbohydrate and its source.

    Type of carbohydrateFood source

    A. Glucose

    B. Sucrose 

    C. Lactose 

    D. Maltose

    pulses and grains

    Cane and beet sugarMilk and milk products

    Malt and cereal products

    Right Option : C
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    Explanation
     
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