IB past paper analysis
Biology SL
May 2025 · Paper 2 · TZ2
See what this paper tests, focus on the skills that carry the marks, and practise matched Exam Vault questions with AI marking.
- 8questions
- 64marks
- 25question parts
- 21micro-topics
Mark distribution
- Form and function28%
- Interaction and interdependence22%
- Unity and diversity19%
- Continuity and change17%
- Experimental and data skills14%
Hardest areas (by marks)
- 1.Why cells respire and how ATP is generated8 marks
- 2.Monohybrid crosses & Punnett grids8 marks
Question types
- explain / justify52%
- outline24%
- write down / state8%
- compare4%
4% of parts are show / prove.
Questions in this paper
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Original Exam Vault questions with AI markscheme feedback for this topic.
Explore topic pages
Every micro-topic in this paper, with its exam pattern and practice.
Browse Biology SL topicsPredicted questions
The likely question types in the next sitting, from the same data.
Predicted Paper 2Good to know
Can I download Biology SL May 2025 TZ2 Paper 2 here?
No. The paper and its mark scheme belong to the IB and are not reproduced. This page gives the structure of every question (marks, command term, micro-topic, the skill tested), the exam analysis, and practice questions we wrote to test the same skills. Subscribers can also open our summary of how each part's marks are awarded.
Which topics dominate May 2025 TZ2 Paper 2?
Form and function 28% (typical 22%), Interaction and interdependence 22% (typical 20%), Unity and diversity 19% (typical 16%).
How do I practise this paper without the paper?
Press "Practise similar" on any question. We open questions matched by micro-topic, command term and mark range with model answers and AI marking, then bring you back here.