IB Biology HL
Questionbank
The IB Biology HL (Higher Level) Questionbank is a great source of practice questions, coming from the entire syllabus! Each question comes with a clear markscheme and solution video, with an experienced IB teacher going through the question step-by-step. The questions are organized by topic and arranged by difficulty, making it the perfect resource for studying a particular concept.
Theme A
Unity & Diversity
A1.1 - Water
Polarity, Hydrogen Bonding, Solvent Properties, Physical Properties, Consequences, Extraterrestrial Life
A1.2 - Nucleic Acids
RNA & DNA Structure, Antiparallel, Complementarity, Directionality, Nucleosome, Hershey-Chase, Radioisotopes, Chargaff
A2.1 - Origin of Cells
Conditions of Early Earth, Living vs. Nonliving, Origin of Cells, Miller-Urey Experiment, LUCA
A2.2 - Cell Structure
Cell Structure, Functions of Life, Microscopy, Atypical Cells, Endosymbiosis, Differentiation, Multicellularism
A2.3 - Viruses
Structure & Diversity, Lytic Cycle, Lysogenic Cycle, Origins, Rapid Evolution of HIV & Influenza Viruses
A3.1 - Diversity of Organisms
Variation, Species, Linnaeus, Binomial System, Speciation, Karyotyping, Genomes, Chromosome #, eDNA, Dichotomous Key
A3.2 - Classification & Cladistics
Classification, Taxons, Clades, Cladograms, Reclassification
A4.1 - Evolution & Speciation
Darwin/Lamarck, Convergent Evolution, Reproductive Isolation, Allopatric/Sympatric Speciation, Hybridisation, Polyploidy
A4.2 - Conservation of Biodiversity
Ecosystem/Species/Genetic Diversity, Anthropogenic Extinction, Ecosystem Loss, Biodiversity Crisis, EDGE programme
Theme B
Form & Function
Theme B All
All Questions in Theme B Form & Function
RV Gold
B1.1 - Carbohydrates & Lipids
Tetravalency of Carbon, Condensation/Hydrolysis, Mono/polysaccharides, Cellulose, Glycoproteins, Lipids, Phospholipids
RV Gold
B1.2 - Proteins
Peptides, Amino Acids, Denaturation, Amino Acid Diversity, Primary/Secondary/Tertiary/Quaternary Structure, Conjugation
RV Gold
B2.1 - Membranes & Membrane Transport
Osmosis, Permeability, Facilitated Diffusion, Membrane Fluidity, Gated Ion Channels, Pumps, Cell-adhesion Molecules
RV Gold
B2.2 - Organelles & Compartmentalization
Compartmentalization, Organelles, Mitochondria, Chloroplast, Nucleus, Ribosomes, Rough ER, Golgi Apparatus, Vesicles
RV Gold
B2.3 - Cell Specialization
Cell Specialization, Differentiation, Stem Cells, Toti/pluri/multipotency, Surface Area - Volume Ratio, Cell Adaptations
RV Gold
B3.1 - Gas Exchange
Gas Exchange in Lungs & Leaf, Adaptations, Ventilation, Lung Volume, Stomatal Density, Haemoglobin, Bohr Shift
RV Gold
B3.2 - Transport
Blood Vessels, Pulse, Coronary Artery, Lymph, Cardiac Cycle, Transpiration (Plants), Stems & Roots, Translocation
RV Gold
B3.3 - Muscle & Motility
Motility, Muscle Contraction, Sliding Filament Model, Antagonistic Muscles, Synovial Joints, Swimming Adaptation
RV Gold
B4.1 - Adaptation to Environment
Habitat, Abiotic Factors, Coral Reef Formation, Biomes, Adaptations in Deserts & Rainforests
RV Gold
B4.2 - Ecological Niches
Fundamental and Realized Niches, Types of Nutrition, Adaptations for Feeding, Photosynthesis
RV Gold
Theme C
Interaction & Interdependence
Theme C All
All Questions in Theme C Interaction & Interdependence
RV Gold
C1.1 - Enzymes & Metabolism
Induced Fit, Activation Energy, Allostery, Competitive & Non-competitive & Feedback Inhibition, Metabolic Pathways
RV Gold
C1.2 - Cell Respiration
ATP, Anaerobic and Aerobic Respiration, Oxidation, Glycolysis, Link Reaction, Krebs Cycle, ETC, Chemiosmosis
RV Gold
C1.3 - Photosynthesis
Energy Transformation, Chromatography, Light, Absorption, Action Spectra, Limiting Factors, Photosystems, Calvin Cycle
RV Gold
C2.1 - Chemical Signaling
Ligands, Quorum Sensing, Chemical Diversity, Signaling Molecules, Receptors, Signal Transduction, G Protein, Mechanism
RV Gold
C2.2 - Neural Signaling
Resting Potential, Propagation, Synapses, Neurotransmitters, EPSP, Action Potentials, Saltatory Conduct, Summation, Pain
RV Gold
C3.1 - Integration of Body Systems
Integration, CNS, Pain Reflex Arc, Brain, Circadian Rhythm, Endocrine System, Feedback Control, Tropisms, Phytohormone
RV Gold
C3.2 - Defence Against Disease
Pathogens, Blood Clotting, Immunity, Lymphocytes, Antibody Production, HIV/AIDS, Antibiotics, Zoonoses, Vaccine
RV Gold
C4.1 - Populations & Communities
Sampling, Population Growth, Competition, Interspecific Relationships, Endemic & Invasive Species, Chi-squared Test
RV Gold
C4.2 - Transfers of Energy & Matter
Carbon Fixation, Autotrophs, Heterotrophs, Trophic Levels, Energy Transfer, Productivity, Carbon Cycle, Keeling Curve
RV Gold
Theme D
Continuity & Change
Theme D All
All Questions in Theme D Continuity & Change
RV Gold
D1.1 - DNA Replication
DNA Replication, Semi-conservative Model, Enzymes, PCR, Gel Electrophoresis, Okazaki Fragments, DNA Proofreading
RV Gold
D1.2 - Protein Synthesis
Transcription, Translation, Gene Expression, Degeneracy, Universality, Mutations, Directionality, Non-coding Regions
RV Gold
D1.3 - Mutations & Gene Editing
Gene Mutations, Consequences, Genetic Variation, Gene Knockout, CRISPR-Cas9
RV Gold
D2.1 - Cell & Nuclear Division
Mitosis, Meiosis, Cytokinesis, Down Syndrome, Nondisjunction, Variation, Proliferations, Cell Cycle, Cyclins, Tumours
RV Gold
D2.2 - Gene Expression
Gene Expression, Regulation, Promoters, Enhancers, Transcription Factors, Epigenesis
RV Gold
D2.3 - Water Potential
Solvation, Osmosis, Tonicity, Dynamic Equilibrium, Contractile Vacuoles, Medical Applications, Water Potential
RV Gold
D3.1 - Reproduction
Asexual Reproduction, Sexual Life Cycle, Human & Plant Reproduction, IVF, Puberty, Fertilization, Reproductive Hormones
RV Gold
D3.2 - Inheritance
PKU, SNPs, Multiple Alleles, Types of Inheritance, Sex Linkage, Pedigree, Independent Assortment, Dihybrid Cross
RV Gold
D3.3 - Homeostasis
Homeostasis, Negative Feedback, Blood Glucose, Diabetes, Thermoregulation, Osmoregulation, Excretion, Kidney
RV Gold
D4.1 - Natural Selection
Variation, Selection Pressures, Heritable Traits, John Endler Experiment
RV Gold
D4.2 - Stability & Change
Stability, Deforestation, Keystone Species, Sustainability, Eutrophication, Biomagnification, Plastics, Succession
RV Gold
D4.3 - Climate Change
Global Warming, Polar Changes, Ocean Currents, Upslope Range Shift, Coral Reef Threats, Wetlands Restoration, Phenology
RV Gold
Practical-based and Extended Response Questions
All
All Questions in Practical-based and Extended Response Questions
RV Gold
Practical-based Questions
Practical-based Questions On All Topics, Paper 1B
RV Gold
Extended Response Questions
Extended Response Questions On All Topics
RV Gold
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More IB Biology HL Resources
Frequently Asked Questions
What is the IB Biology HL Questionbank?
The IB Biology Higher Level Questionbank is a comprehensive collection of IB Biology HL exam-style questions, organised by syllabus subtopic and concept, and sorted by question difficulty. Each question is accompanied by detailed, step-by-step mark schemes and video tutorials created by experienced IB Biology teachers. This resource is ideal for IB Biology HL students looking to practise exam-style questions on specific topics or concepts within their IB Biology Higher Level course, making it a perfect tool for focused exam revision
Where should I start in the Biology HL Questionbank?
The IB Biology Higher Level Questionbank is designed to help students practise exam-style questions on specific topics or concepts within the Biology HL course. To get started, identify a concept you’d like to focus on and navigate to that section of the Biology HL Questionbank. For example, if you want to practise IB Biology HL style questions on Photosynthesis, you can go to Biology HL Theme C (Interaction and Interdependence), then select C1.3, which covers Photosynthesis. On this page there is a carefully designed set of IB Biology HL exam style questions, arranged in increasing order of difficulty. If you’re just beginning your revision, you can start with the easiest questions at the top, or if you’re already confident, you can dive into the medium-difficulty questions and work your way down.
How should I use the Biology HL Questionbank?
The Biology Higher Level Questionbank is ideal for in-depth revision of specific topics or concepts. For instance, if you wanted to improve your understanding of the Diversity of Organisms, you can find over 20 IB Biology HL exam-style questions focused on this concept. Additionally, Revision Village offers an extensive library of Biology HL Practice Exams, where students can experience the length and difficulty of an actual IB exam using the Mock Exam sets. There are also Biology HL Key Concept videos, which allow students to learn and revise any underlying theory they may have missed or misunderstood in class.
What if I finish the Biology HL Questionbank?
With an extensive and ever-growing library of full-length IB Biology HL exam-style questions in the Biology Higher Level Questionbank, completing all of the questions would be a tremendous achievement, putting you in an excellent position for your final exams. If you were able to finish all the questions in the Questionbank, a great next step would be to head to the Biology HL Practice Exams section on Revision Village and challenge yourself with the Mock Exam Papers, simulating the length and difficulty of an actual IB Biology HL exam.