IB Biology Questions by Topic

Every IB Biology theme, from Unity and Diversity to Continuity and Change — with exam-style practice questions for the multiple-choice and data-based Paper 1 and the structured Paper 2. Click any theme to start practising.

3,504Questions
41Topics
5Units

Unit 1: Unity and Diversity

736 questions
1.1

Water

80
1.2

Nucleic Acids

64
1.3

Origins of Cells (HL)

80
1.4

Cell Structure

96
1.5

Viruses (HL)

80
1.6

Diversity of Organisms

96
1.7

Classification and Cladistics (HL)

64
1.8

Evolution and Speciation

80
1.9

Conservation of Biodiversity

96

Unit 2: Form and Function

832 questions
2.1

Carbohydrates and Lipids

96
2.2

Proteins

80
2.3

Membranes and Transport

80
2.4

Cell Specialization

64
2.5

Stem Cells and Differentiation

96
2.6

Gas Exchange

96
2.7

Transport Systems

80
2.8

Muscle and Movement (HL)

80
2.9

Adaptation to Environment

80
2.10

Ecological Niches

80

Unit 3: Interaction and Interdependence

832 questions
3.1

Enzymes and Metabolism

96
3.2

Cell Respiration

64
3.3

Photosynthesis

96
3.4

Chemical Signalling (HL)

80
3.5

Neural Signalling

96
3.6

Integration of Body Systems

96
3.7

Defence Against Disease

96
3.8

Populations and Communities

112
3.9

Transfers of Energy and Matter

96

Unit 4: Continuity and Change

944 questions
4.1

DNA Replication

64
4.2

Protein Synthesis

48
4.3

Mutation and Gene Editing

96
4.4

Cell and Nuclear Division

80
4.5

Gene Expression (HL)

80
4.6

Water Potential

80
4.7

Reproduction

80
4.8

Inheritance

96
4.9

Homeostasis

80
4.10

Natural Selection

64
4.11

Stability and Change

80
4.12

Climate Change

96

Unit 5: Experimental and Data Skills

160 questions
5.1

Practical and Data-Analysis Skills

160

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Frequently Asked Questions

What types of questions are in the IB question bank?

Our question bank includes short-answer, data-based, case-study, extended-response, and multiple-choice questions — mirroring exactly what you will see on Papers 1, 2, and 3 in IB exams.

Are these real IB past paper questions?

Our questions are original, IB-style questions written to match the format, difficulty, and command terms used in actual IB exams. They are not reproductions of past papers.

How are questions organised?

Questions are organised by topic code (e.g. Topic 1.1, 2.3) matching the IB syllabus structure. You can also filter by paper type and topic.

Can I practise questions from a specific topic?

Yes! Click any topic below to jump directly into practice mode with questions filtered to that topic. You can further narrow by paper type.

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