IB past paper analysis

Biology HL
May 2026 · Paper 2 · TZ3

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  • 10questions
  • 93marks
  • 38question parts
  • 28micro-topics

What this paper tests

Mark distribution

  • Interaction and interdependence38%
  • Continuity and change27%
  • Form and function19%
  • Unity and diversity16%

Hardest areas (by marks)

  1. 1.Polysaccharides: structure and function7 marks
  2. 2.Genetics vocabulary & alleles7 marks
  3. 3.Integrating nervous and endocrine systems7 marks

Question types

explain / justify: 34%write down / state: 16%outline: 13%distinguish: 8%3%
  • explain / justify34%
  • write down / state16%
  • outline13%
  • distinguish8%

3% of parts are show / prove.

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Questions in this paper

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Where to go next

Good to know

Can I download Biology HL May 2026 TZ3 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 2026 TZ3 Paper 2?

Interaction and interdependence 38% (typical 26%), Continuity and change 27% (typical 28%), Form and function 19% (typical 23%).

How do I practise this paper without the paper?

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