| I. (a) It is categorised as energy giving food. - Go to II |
| (b) It is categorised as protective food. - Go to III |
| II. (a) It is soluble in water. - [P] |
| (b) It is insoluble in water. - [Q] |
| III. (a) It is needed for clotting of blood. - [R] |
| (b) It helps in formation of haemoglobin. - [s] |
A) Q could be glucose which is instant source of energy.
B) Deficiency of S causes anaemia characterised by pale body colour, body fatigue etc.
C) R causes osteoporosis in adults while S causes goitre in adults.
D) P occurs in the cell wall of plant cells and in fibres.
Correct Answer: B
Solution :
According to the given dichotomous key P, Q, R and S could be glucose, cellulose, calcium and iron respectively. Goitre is caused by deficiency of iodine. Cellulose is complex carbohydrate occurs in the cell wall of plant cells and plant fibres.
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