IB past paper analysis

Biology HL
November 2025 · Paper 2 · TZ3

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  • 10questions
  • 93marks
  • 34question parts
  • 24micro-topics

What this paper tests

Mark distribution

  • Interaction and interdependence46%
  • Form and function22%
  • Continuity and change18%
  • Unity and diversity14%

Hardest areas (by marks)

  1. 1.Polysaccharides: structure and function7 marks
  2. 2.Active sites, specificity and induced fit7 marks
  3. 3.What mutations are & their types7 marks

Question types

explain / justify: 44%outline: 21%write down / state: 18%compare: 6%0%
  • explain / justify44%
  • outline21%
  • write down / state18%
  • compare6%

0% 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 November 2025 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 November 2025 TZ3 Paper 2?

Interaction and interdependence 46% (typical 26%), Form and function 22% (typical 23%), Continuity and change 18% (typical 28%).

How do I practise this paper without the paper?

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