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Human Body and Nutrition — Questions and Answers

Human Body and Nutrition questions cover organ functions, the vitamins and minerals, and the deficiency diseases each causes. The deficiency-to-disease mapping is the single most examined element, and it never changes — making it among the highest-return facts to memorise for any general awareness paper.

10 solved questionsGeneral ScienceFree · no signup

Human Body and Nutrition— Concepts, Formulas & Shortcuts

  • Vitamin deficiencies: A → night blindness, B1 → beriberi, C → scurvy, D → rickets, K → poor clotting.
  • Iron deficiency causes anaemia; iodine deficiency causes goitre.
  • Calcium and phosphorus build bones and teeth; vitamin D aids calcium absorption.
  • The largest organ is the skin; the largest internal organ and gland is the liver.
  • The human body has 206 bones and 32 permanent teeth.
  • Proteins build and repair tissue; carbohydrates and fats supply energy.

Human Body and Nutrition Practice Questions with Answers

Attempt each question first, then open the explanation. All 10 questions below are free to read and require no signup.

  1. Q1.Deficiency of iodine causes:

    Easy
    • AAnaemia
    • BGoitre
    • CRickets
    • DScurvy
    +Show Answer & Explanation

    Answer: B. Goitre

    Explanation: Iodine is needed for thyroid hormones; its lack enlarges the thyroid gland.

    Human Body and Nutrition question 1 of 10

  2. Q2.Which vitamin is essential for blood clotting?

    Moderate
    • AVitamin A
    • BVitamin C
    • CVitamin D
    • DVitamin K
    +Show Answer & Explanation

    Answer: D. Vitamin K

    Explanation: Vitamin K is required to produce several clotting factors.

    Human Body and Nutrition question 2 of 10

  3. Q3.Night blindness results from deficiency of:

    Easy
    • AVitamin A
    • BVitamin B
    • CVitamin C
    • DVitamin E
    +Show Answer & Explanation

    Answer: A. Vitamin A

    Explanation: Vitamin A is needed for rhodopsin, the pigment that enables vision in dim light.

    Human Body and Nutrition question 3 of 10

  4. Q4.Rickets is caused by deficiency of:

    Easy
    • AVitamin A
    • BVitamin C
    • CVitamin D
    • DIron
    +Show Answer & Explanation

    Answer: C. Vitamin D

    Explanation: Vitamin D is needed for calcium absorption; its lack softens and deforms bones in children.

    Human Body and Nutrition question 4 of 10

  5. Q5.Which nutrient is the body's main source of energy?

    Easy
    • AProteins
    • BCarbohydrates
    • CVitamins
    • DMinerals
    +Show Answer & Explanation

    Answer: B. Carbohydrates

    Explanation: Carbohydrates are broken down to glucose, the body's primary fuel.

    Human Body and Nutrition question 5 of 10

  6. Q6.How many permanent teeth does an adult human have?

    Moderate
    • A28
    • B30
    • C32
    • D36
    +Show Answer & Explanation

    Answer: C. 32

    Explanation: A full adult set numbers 32, including the four wisdom teeth.

    Human Body and Nutrition question 6 of 10

  7. Q7.The largest internal organ of the human body is the:

    Moderate
    • AHeart
    • BLiver
    • CLung
    • DKidney
    +Show Answer & Explanation

    Answer: B. Liver

    Explanation: The liver is the largest internal organ and the largest gland in the body.

    Human Body and Nutrition question 7 of 10

  8. Q8.Beriberi is caused by deficiency of:

    Moderate
    • AVitamin B1
    • BVitamin B12
    • CVitamin C
    • DVitamin D
    +Show Answer & Explanation

    Answer: A. Vitamin B1

    Explanation: Thiamine (Vitamin B1) deficiency causes beriberi, affecting nerves and the heart.

    Human Body and Nutrition question 8 of 10

  9. Q9.Which mineral is the chief component of bones and teeth?

    Easy
    • AIron
    • BCalcium
    • CSodium
    • DPotassium
    +Show Answer & Explanation

    Answer: B. Calcium

    Explanation: Calcium, with phosphorus, forms the mineral matrix of bone and enamel.

    Human Body and Nutrition question 9 of 10

  10. Q10.Which nutrient is chiefly responsible for growth and repair of tissue?

    Easy
    • ACarbohydrates
    • BFats
    • CProteins
    • DWater
    +Show Answer & Explanation

    Answer: C. Proteins

    Explanation: Proteins supply the amino acids used to build and repair body tissue.

    Human Body and Nutrition question 10 of 10

Human Body and Nutrition — Frequently Asked Questions

Which deficiency causes goitre?+

Iodine. Without enough iodine the thyroid gland enlarges, producing the swelling in the neck known as goitre — which is why iodised salt is promoted.

Which vitamin helps blood clot?+

Vitamin K. It is required to synthesise clotting factors, so a deficiency leads to prolonged bleeding.

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