Class 9 Nutrition Mock Test (ICSE)

Topics in Nutrition

• Nutrients and their functions
• Balanced diet
• Deficiency diseases
• Malnutrition

Nutrition practice questions with answers

1. Q1Multiple choice·1 mark
   Which of the following mineral elements is essential for the synthesis of haemoglobin in human red blood cells?

   1. (a)Iron
   2. (b)Calcium
   3. (c)Iodine
   4. (d)Phosphorus
   Show answer and step marks

   1. Correct option: (a) Iron+1

   Answer: (a)
2. Q2Multiple choice·1 mark
   What is the primary physiological function of roughage (dietary fiber) when included as an essential component of a balanced diet?

   1. (a)Providing rapid bursts of cellular energy
   2. (b)Regulating basal metabolic rate
   3. (c)Repairing damaged muscle tissues
   4. (d)Facilitating easy bowel movement by retaining water
   Show answer and step marks

   1. Correct option: (d) Facilitating easy bowel movement by retaining water+1

   Answer: (d)
3. Q3Short answer·2 marks
   Define malnutrition. Name any two forms of protein-energy malnutrition commonly observed in young children.
   Show answer and step marks

   1. Definition: Malnutrition is a condition resulting from an unbalanced diet in which certain nutrients are lacking, in excess, or in wrong proportions over a long period.+1
   2. First form, any one of: Kwashiorkor; Marasmus; marasmic kwashiorkor (the combined form); or any other valid form of protein-energy malnutrition.+0.5
   3. Second form, a different one from the same list.+0.5

   Answer: Malnutrition is a condition resulting from an unbalanced diet with nutrients lacking, in excess or in wrong proportions. Any two of: Kwashiorkor, Marasmus, marasmic kwashiorkor.
4. Q4Short answer·2 marks
   Name the deficiency disease caused by a severe lack of proteins in the diet of infants, and state any two of its characteristic symptoms.
   Show answer and step marks

   1. Name of the deficiency disease: Kwashiorkor+1
   2. First symptom, any one of: swelling of the legs, feet and face due to oedema; protruding (pot) belly; stunted growth; thin, sparse, discoloured hair; dry, scaly skin with dark patches; loss of appetite; irritability; diarrhoea; or any other valid symptom.+0.5
   3. Second symptom, a different one from the same list.+0.5

   Answer: Kwashiorkor. Any two of: oedema (swelling of legs and face), protruding belly, stunted growth, discoloured hair, scaly skin, loss of appetite, irritability, diarrhoea.
5. Q5Long answer·4 marks
   (a) Name the simpler units into which proteins are broken down during digestion. (b) Give one example each of a plant source and an animal source of proteins. (c) State any two major physiological functions of fats in the human body.
   Show answer and step marks

   1. (a) Amino acids+1
   2. (b) Plant source, any one of: pulses (dals); soyabean; beans; peas; groundnuts; or any other valid plant source of protein.+0.5
   3. (b) Animal source, any one of: meat; fish; eggs; milk; cheese or paneer; or any other valid animal source of protein.+0.5
   4. (c) First function, any one of: providing concentrated energy (about twice that of carbohydrates per gram); acting as a reserve store of energy; insulating the body against heat loss as a layer beneath the skin; cushioning and protecting organs such as the kidneys; carrying the fat-soluble vitamins A, D, E and K; forming part of cell membranes; or any other valid function.+1
   5. (c) Second function, a different one from the same list.+1

   Answer: (a) Amino acids; (b) Plant: pulses or soyabean, Animal: milk, eggs or meat; (c) Any two of: concentrated energy, energy reserve, thermal insulation, cushioning organs, carrying vitamins A, D, E and K, part of cell membranes.
6. Q6Long answer·4 marks
   (a) Name the class of nutrients that serve as the primary source of energy for the human body and state the simplest form into which they are broken down during digestion. [2] (b) State two important functions of proteins in the human body. [2]
   Show answer and step marks

   1. (a) Carbohydrates are the primary source of energy.+1
   2. (a) They are broken down into glucose (simple sugars) during digestion.+1
   3. (b) First function, any one of: growth and body building; repair of worn-out tissues; formation of enzymes; formation of hormones; formation of antibodies; transport of substances, e.g. haemoglobin carrying oxygen; a source of energy when carbohydrates and fats are short; or any other valid function.+1
   4. (b) Second function, a different one from the same list.+1

   Answer: (a) Carbohydrates; glucose. (b) Any two of: growth and body building, repair of tissues, forming enzymes, hormones and antibodies, transport (haemoglobin), energy when other sources are short.

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