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Nutrition
10 Class 9 Biology questions with answers and explanations.
Printable worksheet with answer key
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Which nutrient is the main source of energy?
- 1 Minerals
- 2 Vitamins
- 3 Carbohydrates
- 4 Water
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Correct answer: Carbohydrates
Carbohydrates are the main and quickest energy source.
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Lack of vitamin C causes:
- 1 Scurvy
- 2 Rickets
- 3 Beriberi
- 4 Night blindness
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Which mineral is needed for strong bones and teeth?
- 1 Calcium
- 2 Iron
- 3 Iodine
- 4 Sodium
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Proteins are digested to:
- 1 Glucose
- 2 Fatty acids
- 3 Amino acids
- 4 Glycerol
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Bile is produced by the:
- 1 Liver
- 2 Pancreas
- 3 Kidney
- 4 Stomach
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Correct answer: Liver
The liver makes bile, which is stored in the gall bladder and helps digest fats.
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Most digested food is absorbed in the:
- 1 Large intestine
- 2 Small intestine
- 3 Stomach
- 4 Oesophagus
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Correct answer: Small intestine
The small intestine has villi that give a large surface for absorption.
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Roughage or dietary fibre helps in:
- 1 Making hormones
- 2 Preventing constipation
- 3 Building bone
- 4 Making blood
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Correct answer: Preventing constipation
Fibre keeps food moving through the gut.
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A balanced diet contains:
- 1 All food groups in proper amounts
- 2 Only protein
- 3 Only sugar
- 4 Only fat
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Correct answer: All food groups in proper amounts
It has carbohydrates, proteins, fats, vitamins, minerals and water.
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Lack of iron in the diet causes:
- 1 Goitre
- 2 Anaemia
- 3 Scurvy
- 4 Rickets
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The enzyme in saliva is:
- 1 Pepsin
- 2 Amylase
- 3 Trypsin
- 4 Lipase