We counted every question in our own IGCSE Biology 0610 question bank — 1,555 questions worth 3,746 marks, 2022 to 2026 — and sorted them into the 21 chapters of the syllabus. Coordination and Response carries the most marks.
Every chapter, heaviest first
| Chapter | Questions | Marks | Share | |
|---|---|---|---|---|
| Coordination and Response | 119 | 326 | 8.7% | |
| Reproduction | 113 | 296 | 7.9% | |
| Human Nutrition | 111 | 286 | 7.6% | |
| Human Influences on Ecosystems | 78 | 251 | 6.7% | |
| Inheritance | 118 | 249 | 6.6% | |
| Organisms and their Environment | 101 | 243 | 6.5% | |
| Transport in Plants | 78 | 228 | 6.1% | |
| Transport in Animals | 77 | 219 | 5.8% | |
| Variation and Selection | 76 | 204 | 5.4% | |
| Plant Nutrition | 73 | 169 | 4.5% | |
| Characteristics and Classification of Living Organisms | 86 | 155 | 4.1% | |
| Movement into and out of Cells | 64 | 149 | 4.0% | |
| Biotechnology and Genetic Modification | 60 | 143 | 3.8% | |
| Gas Exchange in Humans | 43 | 137 | 3.7% | |
| Organisation of the Organism | 77 | 129 | 3.4% | |
| Respiration | 55 | 122 | 3.3% | |
| Diseases and Immunity | 45 | 122 | 3.3% | |
| Enzymes | 59 | 120 | 3.2% | |
| Excretion in Humans | 45 | 102 | 2.7% | |
| Biological Molecules | 51 | 64 | 1.7% | |
| Drugs | 26 | 32 | 0.9% |
The top 7 of 21 chapters hold half the marks in the bank. The three heaviest are Coordination and Response, Reproduction, Human Nutrition. The lightest is Drugs, at 0.9% of the marks.
Inside the chapters
| Sub-topic | Chapter | Questions | Marks |
|---|---|---|---|
| Chemical digestion and enzymes | Human Nutrition | 39 | 119 |
| Factors affecting the rate of transpiration | Transport in Plants | 20 | 101 |
| Hydrophytes and xerophytes | Variation and Selection | 27 | 79 |
| Limiting factors | Plant Nutrition | 21 | 75 |
| Conserving endangered species | Human Influences on Ecosystems | 14 | 72 |
| Food chains and food webs | Organisms and their Environment | 17 | 69 |
| The heart | Transport in Animals | 21 | 66 |
| Circulatory systems | Transport in Animals | 20 | 63 |
| Translocation | Transport in Plants | 23 | 62 |
| Absorption and villi | Human Nutrition | 23 | 61 |
How to use this
Revise the heaviest chapters first. A chapter worth 9% of the marks deserves more than one worth 0.9%.
Use it to decide what to practise, not what to skip. A light chapter can still be the difference between two grades, and Cambridge can set anything on the syllabus.
Check yourself chapter by chapter rather than by whole papers, so a weak topic shows up while there is still time to fix it.
These are ExamYard’s own figures: the questions in our IGCSE Biology 0610 question bank, grouped into the chapter of the syllabus each one tests, and added up by the marks each carries. No question text, mark scheme or examiner report is reproduced on this page. The printed book and the online bank are counted separately, so the totals on this page need not match the book’s own page.