Lesson T1.3.3

T1.3.3 Diet imbalances and disease Quiz: KS3 Biology, Unit 1

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T1.3.3, Diet imbalances and disease: 20 multiple choice questions for the KS3 Biology (National Curriculum), Unit 1: Structure and function of living organisms, written with Revision Ninja.

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The 20 questions

  1. Which condition develops over a long time when the body takes in more energy than it uses?

    • Starvation
    • Rickets
    • Obesity
    • Scurvy

  2. Which body process is mainly impaired by a diet lacking in protein?

    • Oxygen transport
    • Vitamin absorption
    • Water regulation
    • Growth and repair

  3. Rickets, which causes weak and bent bones in children, is linked to a lack of which nutrient?

    • Vitamin D
    • Vitamin C
    • Dietary fibre
    • Iron

  4. Anaemia is often caused by a lack of which mineral?

    • Calcium
    • Iodine
    • Sodium
    • Iron

  5. What is the primary cause of a deficiency disease?

    • High daily energy intake
    • Drinking excess water
    • Eating too much fat
    • Missing essential nutrient

  6. Which condition results from eating very little food over a long time?

    • Scurvy
    • Starvation
    • Obesity
    • Kwashiorkor

  7. Which deficiency causes night blindness?

    • Calcium
    • Vitamin A
    • Vitamin D
    • Vitamin C

  8. What is a likely result of a lack of iron in the diet?

    • Weak bones and teeth
    • Scurvy and bleeding gums
    • Rickets and joint pain
    • Anaemia and tiredness

  9. Why does obesity increase the risk of heart disease?

    • Increased lung capacity
    • Reduced stomach acid
    • Faster nerve impulses
    • Blocked arteries

  10. Which health problem is most likely from a diet low in calcium?

    • Weak bones
    • Poor night vision
    • Bleeding gums
    • Muscle cramps

  11. Which two problems can result from an imbalanced diet?

    • Infection and fever
    • Paralysis and shock
    • Obesity and deficiency
    • Colds and flu

  12. A diet lacking in which vitamin causes bleeding gums and slow healing?

    • Vitamin C
    • Vitamin D
    • Vitamin A
    • Vitamin B

  13. What causes a deficiency disease in someone eating plenty of food?

    • Excessive protein
    • Low total calories
    • Too much sugar
    • Lack of nutrients

  14. Why does starvation weaken the body's defences against infection?

    • Body temperature rises
    • Stomach stops producing acid
    • Lacks cells for defence
    • Lungs absorb less oxygen

  15. What primary health risk is caused by a high-energy diet lacking exercise?

    • Rickets
    • Obesity
    • Scurvy
    • Anaemia

  16. Which food helps prevent rickets by aiding calcium absorption?

    • Oily fish
    • White bread
    • Sugary sweets
    • Lean chicken

  17. What type of illness is caused by lacking a specific nutrient?

    • Infectious disease
    • Inherited disorder
    • Deficiency disease
    • Allergic reaction

  18. A diet consisting only of sweets and fizzy drinks likely causes what?

    • High muscle mass
    • Improved immune defence
    • Obesity and dental decay
    • Strong bones and teeth

  19. What health problem is caused by a severe lack of dietary fibre?

    • Constipation
    • Rickets
    • Scurvy
    • An anaemia

  20. What is provided by a healthy balanced diet?

    • Only pure protein
    • Maximum possible calories
    • Zero fats
    • Correct nutrient amounts

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