IB Biology SL · 2025
Unit 5: Experimental and data skills
86 past paper questions from 14 papers across 4 exam sessions. See what repeats, then practise the same skills with AI marking.
Starter set across the most-tested skills, with AI marking and model answers.
SL archive · 2025 to 2026
Unit 5: Experimental and data skills
Latest exam session: May 2026
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Topics in Unit 5: Experimental and data skills
In syllabus order. The ring is the share of the marks each one carries.
Exam pattern
How often each micro-topic has been examined, year by year. Each label is explained under the grid.
Does it repeat?
Top 4 of 9 micro-topics for the next sitting. Numbers are questions per year.
fewermore
| Micro-topic | 2025 | 2026 |
|---|---|---|
| 32Reading & interpreting graphs, charts & tables, 2025: 32 questions | 7Reading & interpreting graphs, charts & tables, 2026: 7 questions | |
| 8Percentage change, ratios & rate from graphs, 2025: 8 questions | 3Percentage change, ratios & rate from graphs, 2026: 3 questions | |
| 8Reliability, replicates & evaluating method, 2025: 8 questions | ·Reliability, replicates & evaluating method, 2026: 0 questions | |
| 10Mean, standard deviation & error bars, 2025: 10 questions | 1Mean, standard deviation & error bars, 2026: 1 question |
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Questions on Unit 5: Experimental and data skills, by exam session
Which papers asked about Unit 5: Experimental and data skills, and which question numbers. Open a paper to see them highlighted.
May 2026
2 questions across 2 papers
November 2025
8 questions across 4 papers
May 2025
13 questions across 6 papers
Specimen 2025
3 questions across 2 papers
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Frequently asked questions
Short answers about this page.
Which Biology SL exam sessions are covered for Unit 5: Experimental and data skills?
4 exam sessions from 2025 to 2026, the latest May 2026. Every Paper 1 and 2 in every timezone is read and classified in full, which gives 14 papers in this archive.
Which Unit 5: Experimental and data skills topic comes up most?
Reading & interpreting graphs, charts & tables (5.1.4): in 72% of papers, last seen May 26 P2 TZ2. Usually "Compare and contrast / State", worth about 4.7 marks in a paper that includes it.
Can I see the original question and mark scheme?
No. The wording belongs to the IB. You get the citation, the marks, the command term and the skill tested, plus our own matched practice questions with worked answers and AI marking.
What do "banker", "due" and "rising" mean?
Banker: examined in at least one sitting in four and still appearing. Due: regular before, but absent for the last two exam sessions. Rising: clearly more common in the last two years. Our classification of real papers, not an IB statistic.
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