IB

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 B

Form & Function

Theme C

Interaction & Interdependence

Theme D

Continuity & Change

Practical-based and Extended Response Questions

Theme A

Unity & Diversity

Theme B

Form & Function

Theme C

Interaction & Interdependence

Theme D

Continuity & Change

Practical-based and Extended Response Questions

Theme A

Unity & Diversity

Theme A All

All Questions in Theme A Unity & Diversity

Open Study

A1.1 - Water

Polarity, Hydrogen Bonding, Solvent Properties, Physical Properties, Consequences, Extraterrestrial Life

Open Study

A1.2 - Nucleic Acids

RNA & DNA Structure, Antiparallel, Complementarity, Directionality, Nucleosome, Hershey-Chase, Radioisotopes, Chargaff

Open Study

A2.1 - Origin of Cells

Conditions of Early Earth, Living vs. Nonliving, Origin of Cells, Miller-Urey Experiment, LUCA

Open Study

A2.2 - Cell Structure

Cell Structure, Functions of Life, Microscopy, Atypical Cells, Endosymbiosis, Differentiation, Multicellularism

Open Study

A2.3 - Viruses

Structure & Diversity, Lytic Cycle, Lysogenic Cycle, Origins, Rapid Evolution of HIV & Influenza Viruses

Open Study

A3.1 - Diversity of Organisms

Variation, Species, Linnaeus, Binomial System, Speciation, Karyotyping, Genomes, Chromosome #, eDNA, Dichotomous Key

Open Study

A3.2 - Classification & Cladistics

Classification, Taxons, Clades, Cladograms, Reclassification

Open Study

A4.1 - Evolution & Speciation

Darwin/Lamarck, Convergent Evolution, Reproductive Isolation, Allopatric/Sympatric Speciation, Hybridisation, Polyploidy

Open Study

A4.2 - Conservation of Biodiversity

Ecosystem/Species/Genetic Diversity, Anthropogenic Extinction, Ecosystem Loss, Biodiversity Crisis, EDGE programme

Open Study

Theme B

Form & Function

Theme B All

All Questions in Theme B Form & Function

Open Study

RV Gold

B1.1 - Carbohydrates & Lipids

Tetravalency of Carbon, Condensation/Hydrolysis, Mono/polysaccharides, Cellulose, Glycoproteins, Lipids, Phospholipids

Open Study

RV Gold

B1.2 - Proteins

Peptides, Amino Acids, Denaturation, Amino Acid Diversity, Primary/Secondary/Tertiary/Quaternary Structure, Conjugation

Open Study

RV Gold

B2.1 - Membranes & Membrane Transport

Osmosis, Permeability, Facilitated Diffusion, Membrane Fluidity, Gated Ion Channels, Pumps, Cell-adhesion Molecules

Open Study

RV Gold

B2.2 - Organelles & Compartmentalization

Compartmentalization, Organelles, Mitochondria, Chloroplast, Nucleus, Ribosomes, Rough ER, Golgi Apparatus, Vesicles

Open Study

RV Gold

B2.3 - Cell Specialization

Cell Specialization, Differentiation, Stem Cells, Toti/pluri/multipotency, Surface Area - Volume Ratio, Cell Adaptations

Open Study

RV Gold

B3.1 - Gas Exchange

Gas Exchange in Lungs & Leaf, Adaptations, Ventilation, Lung Volume, Stomatal Density, Haemoglobin, Bohr Shift

Open Study

RV Gold

B3.2 - Transport

Blood Vessels, Pulse, Coronary Artery, Lymph, Cardiac Cycle, Transpiration (Plants), Stems & Roots, Translocation

Open Study

RV Gold

B3.3 - Muscle & Motility

Motility, Muscle Contraction, Sliding Filament Model, Antagonistic Muscles, Synovial Joints, Swimming Adaptation

Open Study

RV Gold

B4.1 - Adaptation to Environment

Habitat, Abiotic Factors, Coral Reef Formation, Biomes, Adaptations in Deserts & Rainforests

Open Study

RV Gold

B4.2 - Ecological Niches

Fundamental and Realized Niches, Types of Nutrition, Adaptations for Feeding, Photosynthesis

Open Study

RV Gold

Theme C

Interaction & Interdependence

Theme C All

All Questions in Theme C Interaction & Interdependence

Open Study

RV Gold

C1.1 - Enzymes & Metabolism

Induced Fit, Activation Energy, Allostery, Competitive & Non-competitive & Feedback Inhibition, Metabolic Pathways

Open Study

RV Gold

C1.2 - Cell Respiration

ATP, Anaerobic and Aerobic Respiration, Oxidation, Glycolysis, Link Reaction, Krebs Cycle, ETC, Chemiosmosis

Open Study

RV Gold

C1.3 - Photosynthesis

Energy Transformation, Chromatography, Light, Absorption, Action Spectra, Limiting Factors, Photosystems, Calvin Cycle

Open Study

RV Gold

C2.1 - Chemical Signaling

Ligands, Quorum Sensing, Chemical Diversity, Signaling Molecules, Receptors, Signal Transduction, G Protein, Mechanism

Open Study

RV Gold

C2.2 - Neural Signaling

Resting Potential, Propagation, Synapses, Neurotransmitters, EPSP, Action Potentials, Saltatory Conduct, Summation, Pain

Open Study

RV Gold

C3.1 - Integration of Body Systems

Integration, CNS, Pain Reflex Arc, Brain, Circadian Rhythm, Endocrine System, Feedback Control, Tropisms, Phytohormone

Open Study

RV Gold

C3.2 - Defence Against Disease

Pathogens, Blood Clotting, Immunity, Lymphocytes, Antibody Production, HIV/AIDS, Antibiotics, Zoonoses, Vaccine

Open Study

RV Gold

C4.1 - Populations & Communities

Sampling, Population Growth, Competition, Interspecific Relationships, Endemic & Invasive Species, Chi-squared Test

Open Study

RV Gold

C4.2 - Transfers of Energy & Matter

Carbon Fixation, Autotrophs, Heterotrophs, Trophic Levels, Energy Transfer, Productivity, Carbon Cycle, Keeling Curve

Open Study

RV Gold

Theme D

Continuity & Change

Theme D All

All Questions in Theme D Continuity & Change

Open Study

RV Gold

D1.1 - DNA Replication

DNA Replication, Semi-conservative Model, Enzymes, PCR, Gel Electrophoresis, Okazaki Fragments, DNA Proofreading

Open Study

RV Gold

D1.2 - Protein Synthesis

Transcription, Translation, Gene Expression, Degeneracy, Universality, Mutations, Directionality, Non-coding Regions

Open Study

RV Gold

D1.3 - Mutations & Gene Editing

Gene Mutations, Consequences, Genetic Variation, Gene Knockout, CRISPR-Cas9

Open Study

RV Gold

D2.1 - Cell & Nuclear Division

Mitosis, Meiosis, Cytokinesis, Down Syndrome, Nondisjunction, Variation, Proliferations, Cell Cycle, Cyclins, Tumours

Open Study

RV Gold

D2.2 - Gene Expression

Gene Expression, Regulation, Promoters, Enhancers, Transcription Factors, Epigenesis

Open Study

RV Gold

D2.3 - Water Potential

Solvation, Osmosis, Tonicity, Dynamic Equilibrium, Contractile Vacuoles, Medical Applications, Water Potential

Open Study

RV Gold

D3.1 - Reproduction

Asexual Reproduction, Sexual Life Cycle, Human & Plant Reproduction, IVF, Puberty, Fertilization, Reproductive Hormones

Open Study

RV Gold

D3.2 - Inheritance

PKU, SNPs, Multiple Alleles, Types of Inheritance, Sex Linkage, Pedigree, Independent Assortment, Dihybrid Cross

Open Study

RV Gold

D3.3 - Homeostasis

Homeostasis, Negative Feedback, Blood Glucose, Diabetes, Thermoregulation, Osmoregulation, Excretion, Kidney

Open Study

RV Gold

D4.1 - Natural Selection

Variation, Selection Pressures, Heritable Traits, John Endler Experiment

Open Study

RV Gold

D4.2 - Stability & Change

Stability, Deforestation, Keystone Species, Sustainability, Eutrophication, Biomagnification, Plastics, Succession

Open Study

RV Gold

D4.3 - Climate Change

Global Warming, Polar Changes, Ocean Currents, Upslope Range Shift, Coral Reef Threats, Wetlands Restoration, Phenology

Open Study

RV Gold

Practical-based and Extended Response Questions

All

All Questions in Practical-based and Extended Response Questions

Open Study

RV Gold

Practical-based Questions

Practical-based Questions On All Topics, Paper 1B

Open Study

RV Gold

Extended Response Questions

Extended Response Questions On All Topics

Open Study

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.

Data-based Questions

Original data-based questions to develop skills in analysing trends, evaluating data, and applying biological concepts in preparation for Paper 2.

Practice Exam

Practice exams refine your revision - use quizzes for key concepts, the Revision Ladder for challenge, and full mock exams to simulate the real exam.

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.

Internal Assessment (IA)

In the IB Biology HL Internal Assessment Bootcamp, you will find resources designed around the most important concepts, techniques, and skills required for success in your IA, created by experienced teachers and examiners.

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Flashcards

Use multiple-choice questions and study crucial terminology on desktop or mobile app to improve your marks!

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Frequently Asked Questions

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
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.
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.
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.