Frank Solutions for Chapter 15 Nutrition in Man Class 9 Biology ICSE


1. What is the major role of carbohydrate in our body?
Carbohydrates provide energy and warmth to our body.

2. Write two sources of vitamin C and Vitamin A.
Sources of Vitamin C are Lemon and carrot and sources of Vitamin A are Green vegetables and egg yolk.

3. Which vitamin is called anti-scurvy?
Vitamin C

4. Give two examples of omnivores.
Pigs and crows

5. Which nutrient of food is the principal fuel in the cells?

6. Name the undigestible portion of food which facilitates its movement through the intestine?


7. Name the process of utilizing absorbed food for building body tissue.

8. Which foodstuff yields maximum amount of energy on complete combustion?

9. Explain the following terms with example:
(a) Carnivore
(b) Omnivore
(c) Scavenger
(a) Carnivores are flesh-eating animals that eat other animals. Example – Snakes, Lion, tiger, vulture
(b) Omnivores are animals that feed on both animals and plants. Example – crows, certain bears.
(c) Scavenger is any animal that feeds on refuse and other decaying organic matter. Example – vultures, dung beetle.

10. Distinguish between the following:
(a) Autotrophs and Heterotrophs
(b) Herbivore and Carnivore
(c) Assimilation and Absorption
(a) Difference between Autotrophs and Heterotrophs
Autotrophs  Heterotrophs
They prepare their own food from simple inorganic raw materials. They depend on autotrophs for their food and are unable to synthesize their own food.
Example - Green plants Example - Animals

(b) Difference between Herbivore and Carnivore
Herbivore  Carnivore 
These animals feed on plants  These animals feed on other animals
Example - Goat, Giraffe Example - Lion, frog

(c) Difference between Assimilation and Absorption
Assimilation  Absorption
It involves utilization of absorbed food by different body cells It is the process by which soluble digested food passes from alimentary canal into the blood and lymph through intestinal villi

11. Give the definition of food.
Food is a mixture of nutritive substances which when taken and incorporated into the body
tissues provide materials for energy, repair, growth, reproduction, regulation of life processes and resistance to diseases.

12. Why are proteins described as body-building food?
Proteins are used in the synthesis of new protoplasm to be utilized in growth and tissue repair. Hence they are called body building foods.

13. Give the one-word substitute for the following:
(a) Disease caused by the deficiency of vitamin A.
(b) A macromolecule formed by the linkage of thousands of amino acids.
(c) Anti-rickets vitamin.
(d) Insect-eating organism.
(a) Night-blindness
(b) Protein
(c) Vitamin D
(d) Insectivore

14. State whether the following statements are True or False:
(a) Rickets is caused by the deficiency of iodine.
(b) Vitamin B is water soluble.
(c) Carbohydrate and fats are the main energy yielding foods.
(d) Kwashiorkor is the disease caused by deficiency of iron (Fe).
(e) Citrus fruits are the best source of vitamin C.
(a) False
(b) True
(c) True
(d) False
(e) True

15. Give any four reasons for 'why water is necessary for our body'.
Water is necessary for our body because:
  1. Water acts as solvent for many organic and inorganic compounds
  2. Water facilitates the movement of food materials, waste products and other chemical substances in the cytoplasm and circulatory process.
  3. It plays an important role in regulating body temperature and osmotic pressure of the body fluids.
  4. Water serves as good medium for various metabolic reactions.

16. What is roughage? Give two examples.
The undigested fibrous material present in the food is called roughage. Raw vegetables,
and bran are examples of roughage.

17. Fill in the blanks:
(a) Carbohydrates and fats are ______ yielding food.
(b) Animal starch stored in the muscle and liver is ______.
(c) Fats are compounds of ______ and ______.
(d) ______ and ______ are examples of disaccharides.
(a) energy
(b) glycogen
(c) fatty acid, glycerol
(d) sucrose, maltose

18. Define the following:
(a) Malnutrition
(b) Saprozoic
(c) Vitamin
(a) The condition where people become weak and sick due to insufficient and unbalanced diet is referred to as malnutrition.
(b) Saprozoic nutrition refers to nutrition in which animals feed on dead or decaying matter.
(c) Vitamins are organic compounds regularly required in minute quantities in the diet for normal metabolism, health and growth.

19. Name the sources of the following:
(a) Lactose
(b) Sucrose
(c) Cellulose
(d) Vitamin A
(a) Milk
(b) Sugarcane
(c) Plants
(d) Yellow and green vegetables

20. Write short notes on:
(a) Kwashiorkor
(b) Marasmus
(a) Kwashiorkor develops in children whose diet is deficient in proteins even if sufficient carbohydrates and fats are consumed. This disease is common among infants and children up to 3 years old. The symptoms of Kwashiorkor include reduced body weight, slurred growth, protruding belly and thin legs.
(b) Marasmus is a form of prolonged protein energy malnutrition. It affects infants under one year of age. The symptoms of Marasmus include irreversible muscle degeneration, dry, wrinkled skin, prominent ribs and thin legs.

21. What do you know about deficiency of?
(a) Iron
(b) Iodine
(a) Deficiency of iron leads to anaemia.
(b) Deficiency of iodine leads to goitre.

22. Every question has four options. Choose the correct answer:

(i) Daily requirement of carbohydrate by an adult is
(a) 500 gm
(b) 50 gm
(c) 150 gm
(d) 250 gm
(a) 500 gm

(ii) Marasmus is due to the deficiency of
(a) vitamin C
(b) carbohydrate
(c) fat
(d) food
(d) food

(iii) To get sufficient carbohydrate, one should take
(a) meat
(b) rice
(c) carrot
(d) groundnut
(b) rice

(iv) Which one of the following is the best source for vitamin A?
(a) Apple
(b) Carrot
(c) Honey
(d) Peanuts
(b) Carrot

(v) Fat soluble vitamins are
(a) A, D and E
(b) B, C and D
(c) B, D and E
(d) A, B and C
(a) A, D and E

(vi) Vitamin essential for food clotting is
(a) A
(b) E
(c) C
(d) K
(d) K

(vii) Which one is body-building material?
(a) Mineral matter
(b) Fat
(c) Protein
(d) Sugar
(c) Protein

(viii) Ascorbic acid is vitamin
(a) Vitamin C
(b) Vitamin D
(c) Vitamin B
(d) Vitamin A
(a) Vitamin C

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