IB Biology HL · 2025

3.2 Cell respiration

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HL archive · 2025 to 2026

3.2 Cell respiration

Latest exam session: May 2026

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By year13micro-topics

Micro-topics in 3.2 Cell respiration

In syllabus order. The ring is the share of papers each appears in. 4 of them have no matching questions in this archive.

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 13 micro-topics for the next sitting. Numbers are questions per year.

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Micro-topic20252026
3.2.6Variables affecting the rate of cell respiration
2Variables affecting the rate of cell respiration, 2025: 2 questions4Variables affecting the rate of cell respiration, 2026: 4 questions
3.2.1ATP as the molecule that distributes energy within cells
1ATP as the molecule that distributes energy within cells, 2025: 1 question2ATP as the molecule that distributes energy within cells, 2026: 2 questions
3.2.8Conversion of glucose to pyruvate by stepwise reactions in glycolysis with a net yield of ATP and reduced NAD
3Conversion of glucose to pyruvate by stepwise reactions in glycolysis with a net yield of ATP and reduced NAD, 2025: 3 questions1Conversion of glucose to pyruvate by stepwise reactions in glycolysis with a net yield of ATP and reduced NAD, 2026: 1 question
3.2.15Chemiosmosis and the synthesis of ATP in the mitochondrion
1Chemiosmosis and the synthesis of ATP in the mitochondrion, 2025: 1 question1Chemiosmosis and the synthesis of ATP in the mitochondrion, 2026: 1 question

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Questions on 3.2 Cell respiration, by exam session

Which papers asked about 3.2 Cell respiration, and which question numbers. Open a paper to see them highlighted.

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Frequently asked questions

Short answers about this page.

Which Biology HL exam sessions are covered for 3.2 Cell respiration?

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 15 papers in this archive.

Which 3.2 Cell respiration topic comes up most?

Variables affecting the rate of cell respiration (3.2.6): in 17% of papers, last seen May 26 P1 TZ3. Usually "Identify / Outline", worth about 2.3 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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Reading this page and the exam pattern is free. A free account generates three sets of ten questions and launches one practice set. Pro opens every question in any scope, sets of twenty or all, and unlimited practice.

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