Biology HL
4,948+ IB Questions
Browse through the available chapters to select a topic aligned with your learning goals, then dive deeper into the material to refine your understanding.
2025
2016-2024
Theme A - Unity & Diversity
169 Questions
A.1 - Water
19 Questions
A.2 - Nucleic Acids
18 Questions
A.3 - Origins Of Cells
8 Questions
A.4 - Cell Structure
34 Questions
A.5 - Viruses
4 Questions
A.6 - Diversity Of Organisms
35 Questions
A.7 - Classification & Cladistics
29 Questions
A.8 - Evolution & Speciation
21 Questions
A.9 - Conservation Of Biodiversity
1 Questions
Theme B - Form & Function
333 Questions
B.1 - Carbohydrates & Lipids
47 Questions
B.2 - Proteins
33 Questions
B.3 - Membranes & Membrane Transport
46 Questions
B.4 - Organelles & Compartmentalization
31 Questions
B.5 - Cell Specialization
19 Questions
B.6 - Gas Exchange
24 Questions
B.7 - Transport
70 Questions
B.8 - Muscle & Motility
48 Questions
B.9 - Adaptation To Environment
15 Questions
Theme C - Interaction & Interdependence
561 Questions
C.1 - Enzymes & Metabolism
102 Questions
C.2 - Cell Respiration
68 Questions
C.3 - Photosynthesis
86 Questions
C.4 - Chemical Signalling
18 Questions
C.5 - Neural Signalling
48 Questions
C.6 - Integration Of Body Systems
31 Questions
C.7 - Defence Against Disease
91 Questions
C.8 - Populations & Communities
62 Questions
C.9 - Transfers Of Energy & Matter
55 Questions
Theme D - Continuity & Change
634 Questions
D.1 - DNA Replication
70 Questions
D.2 - Protein Synthesis
58 Questions
D.3 - Mutation & Gene Editing
29 Questions
D.4 - Cell & Nuclear Division
94 Questions
D.5 - Gene Expression
12 Questions
D.6 - Water Potential
7 Questions
D.7 - Reproduction
133 Questions
D.8 - Inheritance
139 Questions
D.9 - Homeostasis
53 Questions
D.10 - Natural Selection
15 Questions
D.11 - Stability & Change
2 Questions
D.12 - Climate Change
22 Questions