Biology – IB

A. Syllabus Content – Topics you will learn

Core (SL)

Topic 1: Cell biology

1.1 Introduction to cells

1.2 Ultrastructure of cells

1.3 Membrane structure

1.4 Membrane transport

1.5 The origin of cells

1.6 Cell division


Topic 2: Molecular biology

2.1 Molecules to metabolism

2.2 Water

2.3 Carbohydrates and lipids

2.4 Proteins

2.5 Enzymes

2.6 Structure of DNA and RNA

2.7 DNA replication, transcription and translation

2.8 Cell respiration

2.9 Photosynthesis


Topic 3: Genetics

3.1 Genes

3.2 Chromosomes

3.3 Meiosis

3.4 Inheritance

3.5 Genetic modification and biotechnology


Topic 4: Ecology

4.1 Species, communities and ecosystems

4.2 Energy flow

4.3 Carbon cycling

4.4 Climate change


Topic 5: Evolution and biodiversity

5.1 Evidence for evolution

5.2 Natural selection

5.3 Classification of biodiversity

5.4 Cladistics


Topic 6: Human physiology

6.1 Digestion and absorption

6.2 The blood system

6.3 Defence against infectious disease

6.4 Gas exchange

6.5 Neurons and synapses

6.6 Hormones, homeostasis and reproduction


Additional higher level (AHL)

Topic 7: Nucleic acids

7.1 DNA structure and replication

7.2 Transcription and gene expression

7.3 Translation


Topic 8: Metabolism, cell respiration and photosynthesis

8.1 Metabolism

8.2 Cell respiration

8.3 Photosynthesis


Topic 9: Plant biology

9.1 Transport in the xylem of plants

9.2 Transport in the phloem of plants

9.3 Growth in plants

9.4 Reproduction in plants


Topic 10: Genetics and evolution

10.1 Meiosis

10.2 Inheritance

10.3 Gene pools and speciation


Topic 11: Animal physiology

11.1 Antibody production and vaccination

11.2 Movement

11.3 The kidney and osmoregulation

11.4 Sexual reproduction


Options for SL/ HL

A: Neurobiology and behaviour

Core topics

A.1 Neural development

A.2 The human brain

A.3 Perception of stimuli


Additional higher level topics

A.4 Innate and learned behaviour

A.5 Neuropharmacology

A.6 Ethology


B: Biotechnology and bioinformatics

Core topics

B.1 Microbiology: organisms in industry

B.2 Biotechnology in agriculture

B.3 Environmental protection


Additional higher level topics

B.4 Medicine

B.5 Bioinformatics


C: Ecology and conservation

Core topics

C.1 Species and communities

C.2 Communities and ecosystems

C.3 Impacts of humans on ecosystems

C.4 Conservation of biodiversity


Additional higher level topics

C.5 Population ecology

C.6 Nitrogen and phosphorus cycles


D: Human physiology

Core topics

D.1 Human nutrition

D.2 Digestion

D.3 Functions of the liver

D.4 The heart


Additional higher level topics

D.5 Hormones and metabolism

D.6 Transport of respiratory gases


B. Assessment 

External assessment details—SL

Assessment Biology SL

External assessment details—HL­

Assessment Biology HL