Free Diet questions for IGCSE Biology (0610), part of Human nutrition. Each question has the answer and the marking points an examiner would look for.
Generate a full Diet worksheet →All Human nutrition questionsWhich row shows the deficiency diseases caused by a lack of vitamin C, vitamin D and iron?
| vitamin C | vitamin D | iron | |
|---|---|---|---|
| A | rickets | scurvy | anaemia |
| B | anaemia | rickets | scurvy |
| C | scurvy | rickets | anaemia |
| D | scurvy | anaemia | rickets |
Answer: C
What deficiency causes rickets?
Answer: D
Diet varies with age, activity and pregnancy.
Explain why a pregnant woman needs more iron and calcium.
Describe the effects of a lack of vitamin D.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | baby’s blood and bones iron for the extra red blood cells (haemoglobin) of the fetus/mother B1 calcium for the baby’s bones and teeth B1 | 2 |
| (b) | rickets, soft bones rickets B1 soft/weak bones because calcium is not absorbed B1 | 2 |
A student burns a peanut of mass 1.20 g under a boiling tube containing 20 cm³ of water. The temperature of the water rises by 32 °C. 4.2 J are needed to raise the temperature of 1 g of water by 1 °C, and 1 cm³ of water has a mass of 1 g.
Calculate the energy transferred to the water.
Calculate the energy released per gram of food, in kJ per g.
The value printed on the food label is much higher. Suggest three reasons why the student’s value is lower.
Suggest two improvements to the method that would give a more accurate value.
Name the nutrient that releases the most energy per gram, and state where it is digested.
Explain why bile is needed for the efficient digestion of fat.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | 2688 J 20 × 4.2 × 32 C1 2688 J A1 | 2 |
| (b) | 2.24 kJ/g 2688 ÷ 1.20 = 2240 J/g C1 2.24 kJ/g (ft their energy) A1 | 2 |
| (c) | heat lost to air/tube; incomplete burning; food lost in transfer Any 3 of: energy lost to the surroundings / air; energy heats the boiling tube; food does not burn completely; time lag moving the burning food under the tube B3 | 3 |
| (d) | insulate / calorimeter; stir; keep flame close Any 2 of: surround the tube with insulation / use a calorimeter; keep the burning food close to the tube / draught shield; stir the water; re-light until it no longer burns B2 | 2 |
| (e) | fat (lipid); small intestine (duodenum) fat / lipid B1 small intestine / duodenum B1 | 2 |
| (f) | emulsifies; larger surface area for lipase; neutralises acid bile emulsifies fats into small droplets B1 increasing the surface area for lipase to act on (allow: neutralises stomach acid for the optimum pH of lipase) B1 | 2 |
A balanced diet contains a variety of nutrients.
State the sources and functions of vitamin C and of iron.
Explain why dietary fibre is important.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | citrus – collagen/scurvy; red meat – haemoglobin vitamin C: citrus fruit B1 needed for collagen/healthy skin and gums (prevents scurvy) B1 iron: red meat/spinach B1 needed to make haemoglobin B1 | 4 |
| (b) | prevents constipation helps peristalsis/prevents constipation B1 | 1 |
Energy requirements vary.
Explain why a teenage boy needs more energy than a young child.
| Part | Answer and marking points | Marks |
|---|---|---|
| larger, growing, more active he is larger and growing B1 more active / higher metabolism B1 | 2 |
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Meet Riyaz →Original Cambridge-style practice questions written for mentorriyaz.in. These are not Cambridge past paper questions, and this site is not affiliated with or endorsed by Cambridge University Press & Assessment. Updated 2026-11-04. Paper generator · mentorriyaz.in