Page 24 - Science Class 06

Fats Proteins
Fats are also important source of energy.
But they contain energy in concentrated
form. Fats give even double the amount of
energy than the energy provided by the
same amount of carbohydrates. Every gram
of fat provides 9 kilocalories of energy
which is double the energy provided by
every gram of carbohydrates.
Important sources of fats are:
Animal Sources : Milk, ghee, bu er, cheese,
meat, fish, eggs, etc.
Plant Sources : Vegetables, nuts, oils, such
as coconut oil, groundnut oil, etc.
Fats : Energy Bank
Our body stores fats to fulfill further
requirement of energy. So, fats are also
called the energy bank in our body.
1. Name any four sources of carbohydrates.
2. Name any two sources of fats.
3. Why should we not eat excessive amount
of fat?
4. What is cellulose?
Aim : To test for the presence of fat in
food items.
Procedure : Take a small quan ty of food
and crush it. Now, put it on a piece of
white paper and rub it. If the piece of
paper turns transulcent or oily, it means
the food contains fat.
24
Proteins are highly complex organic
compound made up of carbon, hydrogen,
oxygen and nitrogen. Some of the proteins
also contain elements such as sulphur and
phosphorus. Proteins are very important in
our food for growth and repair of the
damaged body parts. In other words,
proteins are the materials required to build
and repair our body. Proteins are essen al
for the growth of the child and teenagers.
Proteins are needed for maintenance of
good health and the wear and tear of body
ssues in adults. In addi on to all this,
proteins also supply some energy to the
body. Proteins are made up of nitrogen
containing compounds called amino acids.
Protein-rich food items
Important sources of proteins are:
Animal sources : Milk, fish, meat, eggs, etc.
Plant sources : Pulses (peas, soybean, etc.)
are the main sources of proteins. However,
cereals also contain some amount of
proteins.
The body requirement of proteins for
adults is 1 gram per kilogram of the body
weight, while children of age (10-11
years) require 1.46 grams of proteins per
kg of the body weight.
Science-6