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BIOLOGY [2 Mark Question Answer]

Nutrition · ICSE STD 9 (ICSE - English Medium). 6 questions.

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[2 Mark Question Answer]

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6 questions · timed · auto-graded

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
$2$. 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
$2$. 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
$2$. 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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[2 Mark Question Answer] - BIOLOGY STD 9 Questions - Vidyadip