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P4 General Studies: Digestion and Nutrition (Paper 3 (challenge))
Tutor Prep Guide · the digestive system and the food pyramid, enzymes and bile, energy and nutrient calculations, and balanced eating habits
P4 General Studies: Digestion and Nutrition (Paper 3 (challenge))
Paper three links digestion to circulation and raises the bar with energy requirement, body weight and percentage sums for pre exam revision.
Direct answers In multi step sums, list what is given first, decide between multiplying and dividing, then check whether the percentage looks sensible.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P4 General Studies: Digestion and Nutrition |
| Level | parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety |
02 Questions (10 items)
- FoundationHow are glucose and amino acids carried from the small intestine to the whole body?
- FoundationWhat happens to material that is not absorbed in the large intestine?
- FoundationWhat does the specificity of an enzyme mean?
- IntermediateWhy does chewing food well help digestion?
- IntermediateWhat does long high heat cooking do to vitamins?
- IntermediateWhich disease is caused by a long term lack of vitamin C?
- ChallengeA pupil needs 2000 kcal a day with 50 per cent from carbohydrates at 4 kcal per gram. How many grams are needed?
- ChallengeA pupil weighs 50 kg and needs 1.2 g of protein per kg a day. What is the daily total?
- ChallengeRice of 250 g contains 200 g of carbohydrate. What percentage is carbohydrate?
- Error redoError clinic: is fat always harmful, so we should avoid it completely?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | By the blood, through the circulatory system. | Nutrients enter capillaries and the blood delivers them to organs for use or storage. |
| 2 | Water is taken back and the rest forms faeces that are passed out. | The large intestine reclaims water and stores the residue until it is expelled. |
| 3 | One enzyme usually breaks down only one kind of substance. | Amylase acts on starch only, lipase on fat only. |
| 4 | Food is broken smaller, so more surface meets the digestive juices. | More surface lets enzymes work faster, and choking is less likely. |
| 5 | It destroys some vitamins such as vitamin C. | Vitamin C is heat sensitive, so vegetables are better stir fried quickly or briefly blanched. |
| 6 | Scurvy. | A lack of vitamin C causes bleeding gums and slow healing wounds. |
| 7 | 250.0 g | 2000 times 0.50 gives 1000 kcal, and dividing by 4 gives 250.0 g. |
| 8 | 60.0 g | Fifty times 1.2 gives 60.0 g. |
| 9 | 80.0 per cent | Two hundred divided by 250 times 100 gives 80.0 per cent. |
| 10 | No. | Fat is essential: it insulates, protects organs and carries vitamins; only excess is a problem. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Paper four clears the conductor, insulator and battery direction misconceptions.Tutor Registration →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.