IB

IB Biology SL
Questionbank

The IB Biology SL (Standard 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

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A1.1 - Water

Medium of Life, Polarity, Hydrogen Bonding, Adhesion, Cohesion, Solvent Properties, Physical Properties, Consequences

Open Study

A1.2 - Nucleic Acids

Nucleotides, Bases, RNA & DNA Structure, Antiparallel, Complementarity, Conservation of Code

Open Study

A2.2 - Cell Structure

Prokaryote & Eukaryote Cell Structure, Functions of Life, Light & Electron Microscopy, Atypical Cells

Open Study

A3.1 - Diversity of Organisms

Variation, Species, Linnaeus, Binomial System, Speciation, Karyotyping, Genomes

Open Study

A4.1 - Evolution & Speciation

Darwin/Lamarck, Homologous & Analogous Structures, Convergent Evolution, Speciation, Reproductive Isolation

Open Study

A4.2 - Conservation of Biodiversity

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

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Theme B

Form & Function

Theme B All

All Questions in Theme B Form & Function

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B1.1 - Carbohydrates & Lipids

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

Open Study

RV Gold

B1.2 - Proteins

Amino Acids, Peptides, Essential Amino Acids, Denaturation

Open Study

RV Gold

B2.1 - Membranes & Membrane Transport

Membrane Structure, Diffusion, Membrane Proteins, Osmosis, Permeability, Facilitated Diffusion, Active Transport

Open Study

RV Gold

B2.2 - Organelles & Compartmentalization

Compartmentalization, Organelles

Open Study

RV Gold

B2.3 - Cell Specialization

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

Open Study

RV Gold

B3.1 - Gas Exchange

Gas Exchange in Lungs, Adaptations, Ventilation, Lung Volume, Gas Exchange in Leaf, Stomatal Density

Open Study

RV Gold

B3.2 - Transport

Blood Vessels, Pulse, Coronary Artery, Transpiration & Vessels (Plants), Stems & Roots

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 & 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

Enzymes, Metabolism, Anabolic & Catabolic Reactions, Induced Fit, Specificity, Activation Energy

Open Study

RV Gold

C1.2 - Cell Respiration

ATP, ATP Cycle, Anaerobic & Aerobic Respiration, Rate & Variables

Open Study

RV Gold

C1.3 - Photosynthesis

Energy Transformation, Chromatography, Light Absorption, Action Spectra, Limiting Factors

Open Study

RV Gold

C2.2 - Neural Signaling

Neurons, Resting Potential, Nerve Impulses, Synapses, Neurotransmitters, EPSP

Open Study

RV Gold

C3.1 - Integration of Body Systems

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

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

Open Study

RV Gold

D1.2 - Protein Synthesis

Transcription, Translation, Gene Expression, Codon, Anticodon, Degeneracy, Universality, Elongation, Mutations

Open Study

RV Gold

D1.3 - Mutations & Gene Editing

Gene Mutations, Consequences, Genetic Variation

Open Study

RV Gold

D2.1 - Cell & Nuclear Division

Mitosis, Meiosis, Cytokinesis, Down Syndrome, Nondisjunction, Variation

Open Study

RV Gold

D2.3 - Water Potential

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

Open Study

RV Gold

D3.1 - Reproduction

Sexual/Asexual Reproduction, Sexual Life Cycle, Human & Plant Reproduction, Pollination, IVF, Seed Dispersal

Open Study

RV Gold

D3.2 - Inheritance

Pheno/Genotype, PKU, SNPs, Multiple Alleles, Incomplete/Co-dominance, Sex Linkage, Pedigree, Polygenic Inheritance

Open Study

RV Gold

D3.3 - Homeostasis

Homeostasis, Negative Feedback, Blood Glucose, Diabetes, Thermoregulation

Open Study

RV Gold

D4.1 - Natural Selection

Variation, Selection Pressures, Heritable Traits. John Endler Experiment

Open Study

RV Gold

D4.2 - Stability & Change

Ecosystem Stability, Deforestation, Keystone Species, Sustainability, Eutrophication, Biomagnification, Plastic

Open Study

RV Gold

D4.3 - Climate Change

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

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 SL 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 Exams

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 SL 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 Standard Level Questionbank is a comprehensive collection of IB Biology SL 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 SL students looking to practise exam-style questions on specific topics or concepts within their IB Biology Standard Level course, making it a perfect tool for focused exam revision.
The IB Biology Standard Level Questionbank is designed to help students practise exam-style questions on specific topics or concepts within the Biology SL course. To get started, identify a concept you’d like to focus on and navigate to that section of the Biology SL Questionbank. For example, if you want to practise IB Biology SL style questions on Photosynthesis, you can go to Biology SL Theme C (Interaction and Interdependence), then select C1.3, which covers Photosynthesis. On this page there is a carefully designed set of IB Biology SL 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 Standard Level Questionbank is ideal for in-depth revision of specific topics or concepts. For instance, if you want to improve your understanding of the Diversity of Organisms, you can find over 20 IB Biology SL exam-style questions focused on this concept. Additionally, Revision Village offers an extensive library of Biology SL Practice Exams, where students can experience the length and difficulty of an actual IB exam using the Mock Exam sets. There are also Biology SL 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 SL exam-style questions in the Biology Standard 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 SL Practice Exams section on Revision Village and challenge yourself with the Mock Exam Papers, simulating the length and difficulty of an actual IB Biology SL exam.