A Level 2026 Exam Trends: Pearson Edexcel International A Level Biology

Pearson Edexcel International A Level Biology is assessed with Unit 1 (molecules, cells, exchange), Unit 2 (genetics, classification, biodiversity), Unit 3 (practical), and Units 4/5 (further topics). Check the current spec for exact unit titles. Here are recent trends for 2026.

Paper format and structure

• Structure is unchanged for 2025–2026: written units (MCQ and/or structured) and Unit 3 (practical). Command words (“state”, “describe”, “explain”, “suggest”, “evaluate”) are used consistently; level of detail must match mark allocation.
• Application to unfamiliar contexts (e.g. new organism, data) is common. Practical – planning (method, variables, safety), analysis (data, graphs, conclusions), evaluation (reliability, limitations, improvements). Biological reasoning and accuracy (e.g. units, magnification) are assessed.
• Genetic diagrams and explanation of outcomes; calculations (e.g. magnification, rate) with working and units.

Question types and topics that keep coming up

• Cells and molecules: Cell structure, membranes, DNA replication, protein synthesis, enzymes, respiration, photosynthesis. Precise terms; explanation linking structure and function; calculations (magnification, rate).
• Genetics and evolution: Inheritance (monohybrid, dihybrid, linkage), gene expression, natural selection, speciation. Genetic diagrams with correct notation; explanation of mechanism.
• Ecology and ecosystems: Populations, succession, conservation; application to data or scenarios. Evaluation (reliability, limitations) with specific points.
• Practical: Variables (independent, dependent, control), method (clear, practicable), graph (axis, line, conclusion), evaluation (sources of error, improvements).

Are papers getting easier or harder?

• Standards are maintained via grade boundaries. Reports cite vague answers, incorrect terminology, application to unfamiliar contexts underperforming, practical planning and evaluation as weak areas.
• No reported shift in difficulty; precision in language and application to context are key.

Similarity to past papers and predictability

• Format and style match past Edexcel International series. Past papers are a good guide to topic balance and practical style.
• Topics are predictable from the spec; contexts vary. Marking focus (correct terms, cause–effect, evaluation) is consistent.

Examiner expectations and marking

• Correct biological terms; explanations with cause–effect and structure–function. Describe vs explain – describe = what; explain = why/how. Practical: method clear; evaluation with specific errors and improvements. Genetic diagrams – correct notation and reasoning. Marking consistent with past series.

Assessment style and skills in demand

• Recall (definitions, key facts), application (to unfamiliar contexts, data), practical (planning, analysis, evaluation), synoptic (linking topics).

Focus areas for 2026 revision

1. Key terms – learn exact biological terminology from the spec.
2. Explain – cause–effect; structure–function; application to unfamiliar contexts.
3. Genetic diagrams – correct notation and explanation of outcomes.
4. Practical – planning (variables, method, safety); analysis (graphs, conclusions); evaluation (specific errors, improvements).
5. Past papers – written units and Unit 3 under timed conditions.

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Based on current specification and examiner reports. Always use the latest Pearson Edexcel International A Level Biology specification for your series.