Curriculum
IB Biology HL
Theme A — Unity and diversity
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Theme A — Unity and diversity
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5.1 Tool 1: Experimental Techniques
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5.2 Tool 2: Technology
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5.3 Tool 3: Mathematics
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A1.1 Water
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IB BIOLOGY HL - A1.1 Water - MCQ
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IB Biology HL A1.1 Water - Past paper MCQ
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A1.2 Nucleic acids
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IB BIOLOGY HL - A1.2 Nucleic acids - MCQ
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IB Biology HL A1.2 Nucleic acids - Past paper MCQ
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A2.1 Origins of cells
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A2.1 Origins of cells – Exam questions
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A2.2 Cell structure
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IB BIOLOGY HL - A2.2 Cell structure - MCQ
36 questionsPreview
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IB Biology HL A2.2 Cell structure - Past paper MCQ
14 questionsPreview
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A2.3 Viruses
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IB Biology HL A2.3 Viruses — Topical MCQ practice (3 questions)
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IB Biology HL A2.3 Viruses - Past paper MCQ
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A3.1 Diversity of organisms
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IB Biology HL A3.1 Diversity of organisms — Topical MCQ practice (6 questions)
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IB Biology HL A3.1 Diversity of organisms - Past paper MCQ
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A3.2 Classification and cladistics
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IB BIOLOGY HL - A3.2 Classification and cladistics - MCQ
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IB Biology HL A3.2 Classification and cladistics - Past paper MCQ
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A4.1 Evolution and speciation
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IB Biology HL A4.1 Evolution and speciation — Topical MCQ practice (4 questions)
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IB Biology HL A4.1 Evolution and speciation - Past paper MCQ
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A4.2 Conservation of biodiversity
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IB BIOLOGY HL - A4.2 Conservation — Past papers
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A2.1 Origins of cells - Complete notes (Part 2)
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IB Biology HL - Assignment: Theme A, Unity and diversity
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2.2.4 Amino Acid Diversity
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Theme B — Form and function
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Theme B — Form and function
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B1.1 Carbohydrates and lipids
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IB Biology HL B1.1 Carbohydrates and lipids — Topical MCQ practice (10 questions)
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IB Biology HL B1.1 Carbohydrates and lipids - Past paper MCQ
22 questionsPreview
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B1.2 Proteins
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IB Biology HL B1.2 Proteins — Topical MCQ practice (2 questions)
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IB Biology HL B1.2 Proteins - Past paper MCQ
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B2.1 Membranes and membrane transport
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IB Biology HL B2.1 Membranes and membrane transport — Topical MCQ practice (6 questions)
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IB Biology HL B2.1 Membranes and membrane transport - Past paper MCQ
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B2.2 Organelles and compartmentalization
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IB Biology HL B2.2 Organelles and compartmentalization — Topical MCQ practice (1 question)
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IB Biology HL B2.2 Organelles and compartmentalization - Past paper MCQ
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B2.3 Cell specialization
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IB Biology HL B2.3 Cell specialization — Topical MCQ practice (5 questions)
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IB Biology HL B2.3 Cell specialization - Past paper MCQ
7 questionsPreview
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B3.1 Gas exchange
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IB Biology HL B3.1 Gas exchange — Topical MCQ practice (7 questions)
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IB Biology HL B3.1 Gas exchange - Past paper MCQ
10 questionsPreview
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B3.2 Transport
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IB Biology HL B3.2 Transport — Topical MCQ practice (9 questions)
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IB Biology HL B3.2 Transport - Past paper MCQ
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B3.3 Muscle and motility
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IB Biology HL B3.3 Muscle and motility - Past paper MCQ
29 questionsPreview
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B4.1 Adaptation to environment
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IB Biology HL B4.1 Adaptation to environment — Past-paper MCQ (1 question)
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B4.2 Ecological niches
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IB BIOLOGY HL - B4.2 Ecological niches - MCQ
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IB BIOLOGY HL - B3.3 Muscle and motility - MCQ
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2.4 Organelles & Compartmentalisation
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2.4 Organelles & Compartmentalisation – Unit exam questions
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2.5 Cell Specialisation
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2.5 Cell Specialisation – Exam questions
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IB Biology HL - Assignment: Theme B, Form and function
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3.5.1 Neurones- Function and Structure
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Theme C — Interaction and interdependence
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Theme C — Interaction and interdependence
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C1.1 Enzymes and metabolism
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IB BIOLOGY HL - C1.1 Enzymes and metabolism - MCQ
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IB Biology HL C1.1 Enzymes and metabolism - Past paper MCQ
47 questionsPreview
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C1.2 Cell respiration
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IB BIOLOGY HL - C1.2 Respiration — Past papers
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IB BIOLOGY HL - C1.2 Cell respiration - MCQ
26 questionsPreview
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IB Biology HL C1.2 Cell respiration - Past paper MCQ
28 questionsPreview
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C1.3 Photosynthesis
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IB BIOLOGY HL - C1.3 Photosynthesis — Past papers
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IB BIOLOGY HL - C1.3 Photosynthesis - MCQ
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IB Biology HL C1.3 Photosynthesis - Past paper MCQ
42 questionsPreview
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C2.1 Chemical signalling
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IB BIOLOGY HL - C2.1 Chemical signalling - MCQ
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IB Biology HL C2.1 Chemical signalling - Past paper MCQ
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C2.2 Neural signalling
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IB BIOLOGY HL - C2.2 Neural signalling - MCQ
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IB Biology HL C2.2 Neural signalling - Past paper MCQ
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C3.1 Integration of body systems
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IB BIOLOGY HL - C3.1 Integration of body systems - MCQ
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IB Biology HL C3.1 Integration of body systems - Past paper MCQ
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C3.2 Defence against disease
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IB BIOLOGY HL - C3.2 Defence against disease - MCQ
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IB Biology HL C3.2 Defence against disease - Past paper MCQ
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C4.1 Populations and communities
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IB BIOLOGY HL - C4.1 Populations and communities - MCQ
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C4.2 Transfers of energy and matter
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IB BIOLOGY HL - C4.2 Transfers of energy and matter - MCQ
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IB Biology HL C4.2 Transfers of energy and matter - Past paper MCQ
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IB Biology HL - Assignment: Theme C, Interaction and interdependence
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3.3.11 Interdependence of Photosynthetic Reactions
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Theme D — Continuity and change
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Theme D — Continuity and change
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D1.1 DNA replication
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IB BIOLOGY HL - D1.1 DNA replication - MCQ
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IB Biology HL D1.1 DNA replication - Past paper MCQ
19 questionsPreview
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D1.2 Protein synthesis
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IB BIOLOGY HL - D1.2 Protein synthesis - MCQ
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IB Biology HL D1.2 Protein synthesis - Past paper MCQ
39 questionsPreview
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D1.3 Mutation and gene editing
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IB BIOLOGY HL - D1.3 Mutation and gene editing - MCQ
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IB BIOLOGY HL - D1.3 Mutation — Past papers
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IB Biology HL D1.3 Mutation and gene editing - Past paper MCQ
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D2.1 Cell and nuclear division
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IB BIOLOGY HL - D2.1 Cell and nuclear division - MCQ
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IB Biology HL D2.1 Cell and nuclear division - Past paper MCQ
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D2.2 Gene expression
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IB BIOLOGY HL - D2.2 Gene expression - MCQ
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IB Biology HL D2.2 Gene expression - Past paper MCQ
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D2.3 Water potential
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IB Biology HL D2.3 Water potential - Past paper MCQ
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IB BIOLOGY HL - D2.3 Water potential - MCQ
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D3.1 Reproduction
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IB BIOLOGY HL - D3.1 Reproduction - MCQ
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IB Biology HL D3.1 Reproduction - Past paper MCQ
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D3.2 Inheritance
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IB BIOLOGY HL - D3.2 Inheritance - MCQ
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IB Biology HL D3.2 Inheritance - Past paper MCQ
27 questionsPreview
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D3.3 Homeostasis
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IB BIOLOGY HL - D3.3 Homeostasis — Past papers
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IB BIOLOGY HL - D3.3 Homeostasis - MCQ
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IB Biology HL D3.3 Homeostasis - Past paper MCQ
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D4.1 Natural selection
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IB Biology HL D4.1 Natural selection - Past paper MCQ
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7. Natural Selection
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IB BIOLOGY HL - D4.1 Natural selection - MCQ
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D4.2 Stability and change
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D4.3 Climate change
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IB Biology HL D4.3 Climate change — Topical MCQ practice (12 questions)
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D2.3 Water potential - Complete notes (Part 2)
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IB Biology HL - Assignment: Theme D, Continuity and change
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4.12.1 Causes of Climate Change
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4.12.2 Impact of Climate Change
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4.12.4 Climate Change: Phenology
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4.12.5 Climate Change: Evolution
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5. Tools
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5. Tools
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5.1.1 Safety, Ethical and Environmental Issues in Biology
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5.1.2 Measuring Variables in Biology
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5.1.3 Applying Techniques in Biology
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5.2.1 Applying Technology to Collect Data in Biology
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5.2.2 Applying Technology to Process Data in Biology
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5.3.1 Applying General Mathematics in Biology
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5.3.2 Using Units, Symbols and Numerical Values in Biology
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5.3.3 Processing Uncertainties in Biology
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5.3.4 Graphing in Biology
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6. Inquiry Process
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6. Inquiry Process
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1.2.5 Nucleosomes and Molecular Visualisation Software: Skills
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1.2.6 The Hershey and Chase Experiment
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1.2.7 Chargaff's Data
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1.4.2 Cell Theory: Skills
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1.4.5 Prokaryotic Cell Structure
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1.4.6 Eukaryotic Cell Structure
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1.4.7 Functions of Life
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1.4.8 Eukaryotic Cell Structure: Comparisons and Atypical Examples
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1.4.9 Cell Types and Structures: Skills
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1.4.10 Drawing Cells: Skills
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1.5.1 Virus Structure
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1.5.2 Replication in Viruses
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1.5.3 Origin and Evolution of Viruses
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1.6.1 Biological Species Concept
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1.6.2 Chromosome Number
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1.6.3 Karyograms: Skills
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1.6.4 Genomes
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1.6.5 Comparing Genome Sizes: Skills
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1.6.6 Uses of Genome Sequencing
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1.6.7 Biological Species Concept: Challenges
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1.6.8 Chromosome Number: Cross-Breeding
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1.6.9 Dichotomous Keys: Skills
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1.6.10 Environmental DNA and Barcodes
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1.7.1 Biological Classification
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1.7.3 Reclassification
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1.7.4 Classification System
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1.8.2 Evidence of Evolution
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1.8.3 Convergent Evolution
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1.8.5 Types of Speciation
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1.8.6 Adaptive Radiation
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1.8.7 Speciation in Plants
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1.9.2 Reasons for Extinction
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1.9.3 Ecosystem Loss
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1.9.4 Loss of Biodiversity
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1.9.5 How to Preserve Biodiversity
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2.1.1 Properties of Carbon
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2.1.2 Macromolecules
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2.1.3 Carbohydrates: Definition, Functions and Examples
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2.1.4 Role of Glycoproteins
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2.1.6 Fatty Acids
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2.1.7 Phospholipids
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2.2.1 Formation of Proteins
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2.2.2 The Variety of Proteins
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2.2.3 Protein Structure: Effect of pH and Temperature
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2.2.5 Levels of Protein Structure
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2.2.6 Globular and Fibrous Proteins
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2.3.1 Lipid Bilayers
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2.3.2 Membrane Proteins
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2.3.4 Glycolipids and Glycoproteins
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2.3.5 The Fluid Mosaic Model: Skills
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2.3.6 Membrane Fluidity
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2.3.7 Active Transport and Bulk Transport
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2.3.8 Cell Adhesion
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2.4.1 Cell Organelles
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2.4.2 Cell Compartmentalisation
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2.4.3 Adaptations of Mitochondria and Chloroplasts
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2.4.4 Organelles in Protein Synthesis
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2.4.5 Vesicle Formation
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2.5.1 Stem Cells
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2.5.3 Specialised Cells
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2.5.4 Examples of Specialised Cells
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2.6.1 Gas Exchange in Organisms
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2.6.2 Mammalian Lungs- Adaptations
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2.6.3 Mechanism of Ventilation
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2.6.4 Measuring Lung Volumes- Skills
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2.6.5 Gas Exchange in Plants
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2.6.6 Drawing Leaf Structure- Skills
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2.6.7 Determining Stomatal Density- Skills
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2.6.8 Haemoglobin and Oxygen
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2.6.9 The Bohr Shift
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2.6.10 The Oxygen Dissociation Curve
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2.7.1 Blood Vessels
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2.7.2 Identify Blood Vessels- Skills
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2.7.3 Measuring Pulse Rate- Skills
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2.7.4 Coronary Heart Disease- Skills
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2.7.5 The Transpiration Stream
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2.7.6 Adaptations of Xylem Vessels
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2.7.7 Drawing Root and Stem Structure- Skills
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2.7.8 Tissue Fluid
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2.7.9 Circulatory Systems
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2.7.10 The Mammalian Heart
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2.7.11 The Cardiac Cycle- Skills
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2.7.12 The Roots and Water Transport
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2.7.13 Translocation in Plants
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2.8.1 Adaptations for Movement
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2.8.2 Mechanism of Muscle Contraction
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2.8.3 Skeletal Muscle
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2.8.4 Requirements for Movement
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2.8.5 Movement of Joints- Skills
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2.8.6 Locomotion in Organisms
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2.9.1 Habitats
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2.9.2 Abiotic Factors and Species Distribution
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2.9.3 Species Distribution- Skills
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2.9.4 Abiotic Factors- Marine and Terrestrial
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2.9.5 Biomes
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2.10.2 Methods of Nutrition
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2.10.3 Nutrition in Hominidae: Skills
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2.10.4 Nutrition: Adaptations of Organisms
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2.10.5 Competition Between Species
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3.1.1 Metabolism- Enzymes and Reactions
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3.1.2 Enzyme Action
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3.1.3 Enzyme Activity- Skills
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3.1.4 Enzyme Reaction Rates- Skills
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3.1.5 Activation Energy- Skills
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3.1.6 Metabolic Pathways
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3.1.7 Enzyme Inhibition
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3.2.1 Adenosine Triphosphate (ATP)
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3.2.3 Cell Respiration- Skills
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3.2.4 Oxidation and Reduction
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3.2.5 Glycolysis
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3.2.6 Anaerobic Respiration
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3.2.7 The Link Reaction and The Krebs Cycle
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3.2.8 Oxidative Phosphorylation
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3.2.9 Respiratory Substrates
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3.3.1 The Process of Photosynthesis
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3.3.2 Separating Photosynthetic Pigments- Skills
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3.3.3 Absorption Spectra
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3.3.4 Absorption and Action Spectra- Skills
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3.3.5 Limiting Factors of Photosynthesis- Skills
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3.3.6 Carbon Dioxide Enrichment Experiments
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3.3.7 Photosystems
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3.3.8 Light Dependent Reactions
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3.3.9 Photophosphorylation
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3.3.10 Light Independent Reactions
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3.4.1 Cell Signalling
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3.4.2 Signalling Molecules
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3.4.3 Receiving the Signal
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3.4.4 Transmembrane Receptors
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3.4.5 Epinephrine Receptors
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3.4.6 Intracellular Receptors
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3.4.7 Regulating Cell Signalling
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3.5.2 Nerve Impulses
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3.5.3 Nerve Impulses- Skills
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3.5.4 Synapses
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3.5.5 Action Potentials
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3.5.6 Interpreting Oscilloscope Traces- Skills
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3.5.7 Nerve Conduction Velocity
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3.5.8 Synaptic Transmission
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3.5.9 Neurones in the Brain
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3.6.1 Integration in Living Organisms
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3.6.2 The Nervous System
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3.6.3 Reflex Arc and Movement Control
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3.6.4 Epinephrine and Melatonin
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3.6.5 Control Mechanisms
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3.6.6 Observing Tropic Responses- Skills
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3.6.7 Phototropism
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3.6.8 Plant Hormones
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3.6.9 Regulating Plant Growth and Fruit Ripening
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3.7.1 Pathogens
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3.7.10 Zoonoses
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3.7.11 Vaccines and Immunity
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6.1.1 Exploring in Biology
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6.1.2 Designing in Biology
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6.1.3 Controlling Variables in Biology
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6.2.1 Collecting Data in Biology
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6.2.2 Processing Data in Biology
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6.2.3 Interpreting Results in Biology
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6.3.1 Concluding in Biology
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6.3.2 Evaluating in Biology
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Additional lessons
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3.7.2 Barriers to Pathogens: Skin and Mucous Membranes
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3.7.3 Blood Clotting
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3.7.4 The Immune System
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3.7.5 White Blood Cells
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3.7.6 Adaptive Immune Response
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3.7.7 HIV and AIDS
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3.7.8 Antibiotics
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3.7.9 Antibiotic Resistance
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3.7.12 Evaluating COVID-19 Data- Skills
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3.8.1 Populations in Ecosystems
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3.8.2 Estimating Population Size
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3.8.3 Limiting Population Size
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3.8.4 Limiting Population Size: Examples
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3.8.5 Population Growth Curves: Skills
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3.8.6 Populations: Intraspecific Relationships
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3.8.7 Community: Interspecific Relationships
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3.8.8 Interspecific Competition
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3.8.9 Chi-Squared Test: Skills
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3.9.1 Ecosystems as Open Systems
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3.9.2 Energy Flow in Ecosystems
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3.9.3 Obtaining Carbon Compounds in Ecosystems
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3.9.4 Trophic Levels
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3.9.5 Pyramids of Energy: Skills
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3.9.6 Energy Losses
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3.9.7 Primary and Secondary Production
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3.9.8 The Carbon Cycle
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3.9.9 Nutrient Cycling
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4.1.2 Electrophoresis and PCR
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4.1.3 Electrophoresis and PCR: Applications
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4.2.1 Transcription in Protein Synthesis
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4.2.2 Translation in Protein Synthesis
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4.2.3 The Genetic Code
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4.2.4 Protein Structure and Mutations
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4.2.5 Mechanism of Transcription
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4.2.6 Post-Transcriptional Modification
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4.2.7 Translation and the Proteome
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4.3.1 Gene Mutations
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4.3.2 Consequences of Gene Mutations
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4.3.3 Mutations and Genetic Variation
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4.3.5 Conserved Sequences
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4.4.1 Cell Division
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4.4.3 Mitosis
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4.4.4 Mitosis- Skills
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4.4.5 Meiosis
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4.4.6 Cell Cycle
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4.4.7 Uncontrolled Cell Division and Tumour Formation
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4.4.8 Mitotic Index- Skills
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4.5.2 Regulating Transcription and Translation
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4.5.3 Environment and Gene Expression
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4.5.4 Environment and Gene Expression- Examples
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4.6.1 Osmosis
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4.6.2 Osmosis in Cells
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4.6.3 Osmosis- Skills
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4.6.5 Water Movement in Plant Tissue
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4.7.1 Sexual and Asexual Reproduction
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4.7.2 Sexual Reproduction
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4.7.3 The Menstrual Cycle
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4.7.4 Fertilisation
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4.7.5 Plant Reproduction
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4.7.6 Pollination
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4.7.7 Seed Dispersal and Germination
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4.7.8 Hormones and Puberty
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4.7.9 Gametogenesis
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4.7.10 Fertilisation and Implantation
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4.7.11 Hormones in Pregnancy
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4.7.12 The Placenta
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4.7.13 Hormone Replacement Therapy
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4.8.1 Genetic Inheritance and Genetic Crossing
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4.8.2 Inheritance: Terminology
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4.8.3 Inheriting Alleles
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4.8.4 Sex Determination
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4.8.5 Pedigree Charts
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4.8.6 Continuous Variation: Skills
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4.8.7 Dihybrid Crosses and Unlinked Genes
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4.8.8 Statistical Analysis of Dihybrid Crosses
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4.8.9 Genes and Polypeptides: Skills
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4.8.10 Gene Linkage
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4.8.11 Identifying Recombinants
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4.9.1 Homeostasis: Maintaining the Internal Environment
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4.9.2 Regulation of Blood Glucose
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4.9.3 Thermoregulation
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4.9.4 Osmoregulation and Excretion
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4.9.5 Production of Urine
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4.9.6 Changes in Blood Supply to Organs
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4.10.2 Selection Pressures
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4.10.3 Selection Pressures: Skills
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4.10.4 Gene Pools
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4.10.5 Allele Frequencies: Skills
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4.10.6 Types of Natural Selection
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4.10.7 Hardy-Weinberg Principle
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4.10.8 Artificial Selection
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4.11.1 Stability in Ecosystems
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4.11.2 Ecosystem Stability: Skills
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4.11.3 Keystone Species
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4.11.4 Sustainability in Ecosystems and Agriculture
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4.11.5 Eutrophication
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4.11.6 The Effects of Pollution
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4.11.7 Restoring Ecosystems
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4.11.8 Ecological Succession
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4.11.9 Human Influence on Succession
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4.12.3 Carbon Sequestration
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Quiz
IB BIOLOGY HL – D3.3 Homeostasis — Past papers
- Questions count: 10
- Passing grade: B+
- Time limit: 10 minutes