Exercise 1 — IGCSE 0653 May/Jun 2023 Paper 41 Q7
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chlorophyll
Cambridge IGCSE·Combined Sciences 0653·Biology
Plant Nutrition
Key knowledge — Plant Nutrition
Formulas & equations
Photosynthesis: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (light energy needed, chlorophyll)
Key facts & rules
- Reactants of photosynthesis: carbon dioxide (from air via stomata) and water (from soil via roots/xylem).
- Products: glucose (used for respiration, storage as starch, building cell walls) and oxygen (released).
- Limiting factors: light intensity, CO₂ concentration, temperature.
- Chlorophyll is found in chloroplasts, mainly in palisade mesophyll cells.
- Iodine test (blue-black) confirms starch is present = photosynthesis has occurred.
- Plants also need mineral ions: nitrates (for amino acids/protein), magnesium (for chlorophyll).
- Deficiency symptoms: nitrate deficiency → stunted growth, yellow leaves; magnesium deficiency → yellow leaves (chlorosis).
IGCSE Biology — Plant Nutrition
14 Cambridge IGCSE 0653 Combined Sciences past paper questions on plant nutrition, across Theory, Multiple Choice and Alternative to Practical.
About Plant Nutrition on IGCSE 0653
Plants make their own food through photosynthesis, using light energy to convert carbon dioxide and water into glucose and oxygen. This topic covers the conditions needed for photosynthesis, the role of chlorophyll, and how plants use mineral ions for growth.
What's covered:
- Word and symbol equation for photosynthesis
- Role of chlorophyll and light
- Limiting factors: light intensity, CO₂ concentration, temperature
- Leaf structure: palisade cells, spongy mesophyll, stomata
- Mineral ions: nitrates for protein, magnesium for chlorophyll
Theory
Plant Nutrition — Extended2 · Paper 4
Exercise 2 — IGCSE 0653 May/Jun 2024 Paper 41 Q7
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P photosynthesis
Multiple choice
Plant Nutrition — Core MCQ6 · Paper 1
Question 1 — IGCSE 0653 Mar 2023 Paper 12 Q12
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Correct answer: D
Question 2 — IGCSE 0653 Mar 2023 Paper 12 Q13
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Correct answer: B
Question 3 — IGCSE 0653 Mar 2023 Paper 12 Q14
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Correct answer: D
Question 4 — IGCSE 0653 May/Jun 2023 Paper 13 Q1
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Correct answer: C
Question 5 — IGCSE 0653 May/Jun 2023 Paper 13 Q2
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Correct answer: C
Question 6 — IGCSE 0653 May/Jun 2023 Paper 13 Q3
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Correct answer: B
Plant Nutrition — Extended MCQ6 · Paper 2
Question 1 — IGCSE 0653 May/Jun 2023 Paper 23 Q1
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Correct answer: C
Question 2 — IGCSE 0653 May/Jun 2023 Paper 23 Q2
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Correct answer: C
Question 3 — IGCSE 0653 May/Jun 2023 Paper 23 Q3
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Correct answer: A
Question 4 — IGCSE 0653 May/Jun 2024 Paper 22 Q1
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Correct answer: A
Question 5 — IGCSE 0653 May/Jun 2024 Paper 22 Q2
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Correct answer: D
Question 6 — IGCSE 0653 May/Jun 2024 Paper 22 Q3
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Correct answer: B
All Plant Nutrition questions in this collection
| Type | Level | Paper | Session | Q# | Marks | Answer / key |
|---|---|---|---|---|---|---|
| MCQ | Core | Paper 12 | Mar 2023 | Q12 | 1 mark | D |
| MCQ | Core | Paper 12 | Mar 2023 | Q13 | 1 mark | B |
| MCQ | Core | Paper 12 | Mar 2023 | Q14 | 1 mark | D |
| MCQ | Core | Paper 13 | May/Jun 2023 | Q1 | 1 mark | C |
| MCQ | Core | Paper 13 | May/Jun 2023 | Q2 | 1 mark | C |
| MCQ | Core | Paper 13 | May/Jun 2023 | Q3 | 1 mark | B |
| MCQ | Extended | Paper 23 | May/Jun 2023 | Q1 | 1 mark | C |
| MCQ | Extended | Paper 23 | May/Jun 2023 | Q2 | 1 mark | C |
| MCQ | Extended | Paper 23 | May/Jun 2023 | Q3 | 1 mark | A |
| MCQ | Extended | Paper 22 | May/Jun 2024 | Q1 | 1 mark | A |
| MCQ | Extended | Paper 22 | May/Jun 2024 | Q2 | 1 mark | D |
| MCQ | Extended | Paper 22 | May/Jun 2024 | Q3 | 1 mark | B |
| Theory | Extended | Paper 41 | May/Jun 2023 | Q7 | 10 marks | chlorophyll |
| Theory | Extended | Paper 41 | May/Jun 2024 | Q7 | 9 marks | P photosynthesis |