IB past paper analysis

Biology HL
November 2025 · Paper 2 · TZ1

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  • 9questions
  • 93marks
  • 35question parts
  • 29micro-topics

What this paper tests

Mark distribution

  • Continuity and change29%
  • Form and function26%
  • Interaction and interdependence20%
  • Unity and diversity18%
  • Experimental and data skills7%

Hardest areas (by marks)

  1. 1.Structure and diversity of viruses7 marks
  2. 2.Synaptic transmission7 marks
  3. 3.Blood glucose regulation7 marks

Question types

explain / justify: 51%write down / state: 11%outline: 9%find / solve: 6%0%
  • explain / justify51%
  • write down / state11%
  • outline9%
  • find / solve6%

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 TZ1 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 TZ1 Paper 2?

Continuity and change 29% (typical 28%), Form and function 26% (typical 23%), Interaction and interdependence 20% (typical 26%).

How do I practise this paper without the paper?

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