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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

Theme A All

All Questions in 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

Data-based, Practical-based, and Extended Response Questions

All

All Questions in Data-based, Practical-based, and Extended Response Questions

RV Gold

Data-based Questions

Data-based Questions On All Topics

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

Questionbank

All the questions you could need! Sorted by topic and arranged by difficulty, with mark schemes and video solutions for every question.

New

Practice Exams

Choose your revision tool! Contains topic quizzes for focused study, Revision Village mock exams covering the whole syllabus, and the revision ladder to precisely target your learning.

New

Key Concepts

Helpful refreshers summarizing exactly what you need to know about the most important concepts covered in the course.

Past Papers

Full worked solutions to all past paper questions, taught by experienced IB instructors.

Frequently Asked Questions

The IB Biology HL Questionbank is a comprehensive set of IB Biology exam style questions, categorised into syllabus topic and concept, and sorted by difficulty of question. The bank of exam style questions are accompanied by high quality step-by-step marksBioes and video tutorials, taught by experienced IB Biology teachers. The IB Biology HL Question bank is the perfect exam revision resource for IB students looking to practice IB Biology exam style questions in a particular topic or concept in their IB Biology Higher Level course.

The IB Biology HL Questionbank is designed to help IB students practice Biology HL exam style questions in a specific topic or concept. Therefore, a good place to start is by identifying a concept that you would like to practice and improve in and go to that area of the Biology HL Question bank. For example, if you want to practice Biology HL exam style questions covering Cell Division, you can go to Biology HL Topic 1 (Cell Biology) and go to the Cell Division area of the question bank. On this page there is a carefully designed set of IB Biology HL exam style questions, progressing in order of difficulty from easiest to hardest. If you’re just getting started with your revision, you could start at the top of the page with the easiest questions, or if you already have some confidence, you could start at the medium difficulty questions and progress down.

The Biology HL Questionbank is perfect for revising a particular topic or concept, in-depth. For example, if you wanted to improve your knowledge of Cell Division, there are over 20 IB Biology HL exam style questions focused specifically on this concept. Alternatively, Revision Village also has an extensive library of Biology HL Practice Exams, where students can simulate the length and difficulty of an IB exam with the Mock Exam sets, as well as Biology HL Key Concepts, where students can learn and revise the underlying theory, if missed or misunderstood in class.

With an extensive and growing library of full length IB Biology HL exam style questions in the Biology HL Question bank, finishing all of the questions would be a fantastic effort, and you will be in a great position for your final exams. If you were able to complete all the questions in the Biology HL Question bank, then a popular option would be to go to the Biology HL Practice Exams section on Revision Village and test yourself with the Mock Exam Papers, to simulate the length and difficulty of an actual IB Biology HL exam.