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The Most-Tested IGCSE Biology (0610) Topics — We Analysed 2,800+ Past-Paper Questions

PapaMarks Team · July 13, 2026 · 5 min read

#0610 #Biology #Most tested topics #Data #Past papers #Revision #Cambridge

Which IGCSE Biology topics come up most in the exam? We analysed 2,881 real past-paper questions from our Cambridge IGCSE Biology (0610) library and tagged every one to its syllabus topic. The headline finding is different from the other sciences: Biology is remarkably evenly spread — which changes how you should revise it. Here's the data.

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Method: we counted 2,881 genuine past-paper questions across the chapters of the Cambridge IGCSE Biology 0610 syllabus and grouped them by topic. Percentages are the share of past-paper questions in our library — a strong proxy for how often each area is examined. (Exact weightings vary by series; use this to prioritise, not as a guarantee.)

The most-tested IGCSE Biology topics

IGCSE Biology 0610 — top chapters

Share of 2,881 past-paper questions · PapaMarks

Reproduction9.4%

271

Inheritance8.7%

251

Human Nutrition8.2%

237

Coordination & Response7.3%

211

Organisms & Their Environment6.2%

180

Human Influences on Ecosystems6.1%

176

Characteristics & Classification5.4%

156

Transport in Animals5.1%

146

Plant Nutrition4.8%

139

Transport in Plants4.7%

135

Top 10 of 21 chapters · analysis of 2,881 IGCSE Biology 0610 questions · papamarks.com

3 things the data tells you

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1. Biology is the "you can't skip anything" science. Unlike Maths or Physics, no single chapter dominates — the top area (Reproduction) is only ~9.4%. Marks are spread across 20+ topics, so broad coverage beats deep specialisation.

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2. Reproduction, Inheritance & Human Nutrition lead. These three top chapters (~26% combined) reward precise definitions and genetic-cross technique — high-value places to be flawless.

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3. It's a terminology exam. Because questions spread thin, the difference between grades is precise vocabulary and answering the command word — not memorising one big topic.

The 10 most-tested individual topics

#	Topic	Share of questions
1	Monohybrid Inheritance	3.2%
2	Sexual Reproduction in Humans	3.1%
3	Sexual Reproduction in Plants	3.1%
4	Diet & Deficiencies	2.9%
5	Genetic Modification	2.2%
6	Characteristics of Living Organisms	2.1%
7	Anaerobic Respiration	1.9%
8	Food Chains & Food Webs	1.8%
9	Drugs in Medicine	1.8%
10	Nutrient Cycles	1.6%

Core vs Extended: the split

In our data, about 62% of questions were Extended-tier and 38% Core-tier. Since an A* requires the Extended papers, make Extended-level questions the bulk of your practice.

Questions that come up again and again

Certain question types recur across series in our data. Know these cold:

Characteristics of living organisms (MRS GREN) — matching definitions to the seven life processes; one of the most repeated question types in the whole subject.
Monohybrid genetic crosses — e.g. long-winged × short-winged fruit flies; predicting offspring ratios with a Punnett square.
Classification & kingdoms — which organisms share features or genetic code.
Diet & deficiency diseases — linking a missing nutrient to its deficiency symptom.

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These patterns come from thousands of real questions. Drill each on past papers until it's automatic.

How to turn this into a revision plan

Cover everything — but lead with the top chapters
Start with Reproduction, Inheritance and Human Nutrition, then work steadily through the rest. You can't afford big gaps in Biology.
Master the definitions
Precise terminology is where the grades are. Learn the exact wording the mark scheme rewards.
Drill genetic crosses
Monohybrid inheritance appears constantly — practise Punnett squares until they're second nature.
Practise command words
Describe vs explain vs suggest — answering the right one is worth easy marks.

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Practise by topic with instant AI marking: IGCSE Biology 0610 past papers and revision notes. Then read how to get an A* in IGCSE Biology 0610.

FAQ

What is the most tested topic in IGCSE Biology 0610?

By chapter, Reproduction is the most-tested area (~9.4% of past-paper questions in our analysis), closely followed by Inheritance and Human Nutrition. By specific topic, Monohybrid Inheritance and Sexual Reproduction appear most often.

Can I skip topics in IGCSE Biology?

Not really — Biology is unusually evenly spread, so marks come from 20+ topics rather than one or two dominant areas. Broad coverage plus precise terminology is the winning approach.

Which Biology topics are worth the most?

The top chapters are Reproduction, Inheritance and Human Nutrition (~26% combined), but because the subject is spread out, don't neglect the middle chapters either.

How was this data calculated?

We analysed 2,881 genuine past-paper questions in our Cambridge IGCSE Biology 0610 library, tagged each to its syllabus topic, and calculated the share per chapter and topic. It reflects our question bank; exact exam weightings vary by series.

IGCSE Biology rewards breadth and precision, not a lucky topic bet. Cover the whole syllabus, lead with Reproduction, Inheritance and Nutrition, drill your genetic crosses and definitions on real past papers — and you'll be earning marks wherever the exam lands.

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