[2 Mark Question Answer]

Question 12 Marks

A doctor advises a bone patient to include more of milk and milk products in his everyday food. Why so?

Answer

Bones are generally made of calcium and iron. Milk and milk products are rich in calcium and Vitamin $A$. That is why a doctor advises a bone patient to include more of milk and milk products in his everyday food to make his bones and teeth strong. Milk also prevents oxidation of Vitamin $A$. Calcium present in milk even helps in the clotting of blood. Milk is therefore a wholesome food.

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Question 22 Marks

Define and give one example of a balanced diet.

Answer

A balanced diet is defined as the one which contains all the principal constituents of food in proper quantity.
A balanced diet is the one that provides at least $50\%$ of energy from carbohydrates, $35\%$ from fat, and $15\%$ from protein. The precise optimal quantities of each nutrient will vary with age, sex and activity.

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Question 32 Marks

Give two examples of the following and their usefulness, if any, in our body.
Polysaccharides

Answer

CARBOHYDRATES	EXAMPLES	USES
Polysaccharides	$1$. Cellulose	Acts as roughage which prevents constipation
Polysaccharides	$2$. Glycogen	Reserve carbohydrate in humans and stored in liver and muscles

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Question 42 Marks

Give two examples of the following and their usefulness, if any, in our body.
Disaccharides

Answer

CARBOHYDRATES	EXAMPLES	USES
Disaccharides	$1$. Sucrose	Provides an instant source of energy
Disaccharides	$2$. Maltose	Needed for maintaining a healthy body

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Question 52 Marks

Give two examples of the following and their usefulness, if any, in our body.
Monosaccharides

Answer

CARBOHYDRATES	EXAMPLES	USES
$(i)$ Monosaccharides	$1$. Glucose	Provides an instant source of energy
$(i)$ Monosaccharides	$2$. Fructose	Needed for maintaining a healthy body

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Question 62 Marks

Why are proteins necessary in our food? Name one protein deficiency disease of young children.

Answer

Proteins are the body building foods. They provide the chemical material for the growth and repair of body cells and tissues. At the time of emergency, proteins can also be oxidized in the body to release energy.
Protein deficiency disease of young children: Kwashiorkor

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BIOLOGY [2 Mark Question Answer]

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