D. LONG ANSWER TYPE
1. List the six main purposes for which food is
(v
required by the body
2. Why are proteins necessary in our food ?
Name one protein deficiency disease of
young
children.
3. Taking the examples of whole grain atta, fruit and
green leafy vegetables, describe how roughage in
our diet is useful.
Answers
Answer:
1) For making new cells for the growth of the body.
making new cells for the growth of the body. 2. For the repair of worn out cells.
making new cells for the growth of the body. 2. For the repair of worn out cells.3. For carrying out various life processes.
making new cells for the growth of the body. 2. For the repair of worn out cells.3. For carrying out various life processes. 4. For maintaining the chemical composition of cells.
making new cells for the growth of the body. 2. For the repair of worn out cells.3. For carrying out various life processes. 4. For maintaining the chemical composition of cells. 5. For making raw material for the enzymes, hormones, sweat, milk etc.
making new cells for the growth of the body. 2. For the repair of worn out cells.3. For carrying out various life processes. 4. For maintaining the chemical composition of cells. 5. For making raw material for the enzymes, hormones, sweat, milk etc. 6. For the protection of the body from diseases
3) The cells of all plants have cell walls made of cellulose. It is not digested in our alimentary canal as we have no cellulose-digesting enzyme. The undigested cellulose being fibrous in nature acts as roughage.
The cells of all plants have cell walls made of cellulose. It is not digested in our alimentary canal as we have no cellulose-digesting enzyme. The undigested cellulose being fibrous in nature acts as roughage. Role of roughage: Being fibrous, cellulose absorbs a lot of water and retains it, thus helps in keeping the faecal matter soft and prevents constipation. The movement of undigested food becomes easier. It stimulates the muscle contraction in the intestinal wall, making the movement of faecal matter easy. It helps in the removal of cholesterol. So, whole grain atta, green leafy vegetables and fruits are plant sources that are efficient sources of roughage.
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