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Quiz Chapter 3: Nutrition

10 questions · Form 2 Science Bab 3: Nutrition

Question 1 of 10Score: 0

Which structural feature of the villus is specifically responsible for absorbing fatty acids and glycerol?

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which structural feature of the villus is specifically responsible for absorbing fatty acids and glycerol?

  1. Blood Capillary
  2. Lacteal
  3. Thick Epithelium
  4. Mucus Gland
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Answer: B

Lacteals are specialized lymphatic vessels located inside each villus that absorb fatty acids, glycerol, and fat-soluble vitamins.

2. By what mechanism does food travel down the oesophagus into the stomach?

  1. Gravitational Freefall
  2. Peristalsis
  3. Active Transport
  4. Osmotic Suction
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Answer: B

Peristalsis is the wave-like muscular contraction and relaxation of intestinal walls pushing food through the alimentary canal.

3. Where does the final complete digestion of proteins into individual amino acids occur?

  1. Stomach
  2. Mouth
  3. Small Intestine
  4. Large Intestine
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Answer: C

Final digestion occurs in the ileum of the small intestine where intestinal enzymes (such as intestinal protease) break peptides down into amino acids.

4. Why do teenage boys generally require higher daily energy intake than teenage girls of the same age?

  1. Teenage boys have higher body fat percentage
  2. Teenage boys generally have higher muscle mass and basal metabolic rate
  3. Teenage girls digest food faster than boys
  4. Teenage boys possess shorter digestive tracts
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Answer: B

Higher muscle mass in males demands more metabolic energy to sustain physiological activities.

5. If 1 calorie equals 4.2 Joules, how many Joules of heat energy are present in a meal containing 500 calories?

  1. 119 J
  2. 2100 J
  3. 500 J
  4. 4200 J
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Answer: B

500 cal × 4.2 J/cal = 2100 Joules.

6. What is the primary role of dietary fibre in the human digestive system?

  1. Providing quick chemical energy
  2. Stimulating peristalsis to prevent constipation
  3. Emulsifying fats in the duodenum
  4. Synthesizing hemoglobin in red blood cells
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Answer: B

Dietary fibre adds bulk to undigested material, helping the intestinal muscles push waste efficiently through peristalsis.

7. What happens during the assimilation process of glucose in human liver and muscle cells?

  1. Excess glucose is converted into amino acids
  2. Glucose is oxidized to release energy, and excess is stored as glycogen
  3. Glucose is excreted through the rectum during defaecation
  4. Glucose is converted directly into bile salts
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Answer: B

During assimilation, cells oxidize glucose for cellular energy. Excess glucose is converted by insulin into glycogen for storage.

8. A patient suffers from bleeding gums and slow wound healing. Which vitamin deficiency is the patient most likely experiencing?

  1. Vitamin A
  2. Vitamin C
  3. Vitamin D
  4. Vitamin K
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Answer: B

Vitamin C deficiency causes scurvy, characterized by swollen and bleeding gums, skin hemorrhages, and delayed healing of wounds.

9. Which food class is crucial for structural tissue repair, muscle growth, and hormone synthesis?

  1. Carbohydrates
  2. Proteins
  3. Fats
  4. Minerals
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Answer: B

Proteins are composed of amino acids required for the synthesis of new cells, growth, tissue repair, and enzyme formation.

10. Which condition is caused by severe lack of Iron in the daily diet?

  1. Osteoporosis
  2. Anaemia
  3. Goitre
  4. Kwashiorkor
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Answer: B

Iron is essential to synthesize hemoglobin; a deficiency reduces red blood cell count, resulting in anaemia.

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