Edexcel International A Level (IAL) Biology(YBI11) Study Notes - New Syllabus
Edexcel International A Level (IAL) Biology (YBI11) Study Notes
Edexcel IAL Biology (YBI11) Study Notes at IITian Academy focus on the specific topics and question styles seen in real exams. Notes are aligned to the latest syllabus for assessment from 2025.
Concise and comprehensive IAL Biology (YBI11) revision notes help you prepare efficiently with clear summaries, key definitions, diagrams, and worked examples. Strengthen your understanding of core concepts, reinforce exam-ready knowledge, and build confidence.
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Edexcel International A Level (IAL) Biology(YBI11) Study Notes
Topic 1: Molecules, Transport and Health
Biological Molecules
Circulatory System
- 1.6-1.7 Blood Vessels: Structure & Function
- 1.8 The Cardiac Cycle
- 1.9 The Role of Haemoglobin
- 1.10 Atherosclerosis
- 1.11 Blood Clotting
Topic 2 : Membranes, Proteins, DNA and Gene Expression
- 2.1 Properties of Gas Exchange Surfaces
- 2.2 Cell Membranes
- 2.3 Core Practical 3: Investigating Membrane Structure & Permeability
- 2.4-2.5 Osmosis, Diffusion and Transport
Protein
- 2.6 Amino Acids, Proteins & Protein Structure
- 2.7 Enzymes: Roles & Modes of Action
- 2.8 Core Practical 4: Investigating the Rate of Enzyme Reactions
- 2.9 Nucleotides, DNA & RNA, Base Pairing
Topic 3 : Cell Structure, Reproduction and Development
Cell Structure and Organization
- 3.1 Cell Theory
- 3.2 Levels of Organisation of Cells
- 3.3 Eukaryotic Cells
- 3.4 The Rough Endoplasmic Reticulum & Golgi
- 3.5 Prokaryotic Cells
- 3.6-3.7 Electron Microscopy of Animal Cells
- 3.8 Core Practical 5: Light Microscopy
- 3.9 Gene Locus
- 3.10 Meiosis & Variation
- 3.11-3.12 Fertilization: Mammals
- 3.13 Fertilization: Flowering Plants
- 3.14 The Cell Cycle & Mitosis
- 3.15 Core Practical 6: Observing the Stages of Mitosis
- 3.16 Calculation of Mitotic Index
- 3.17 Stem Cells & Cell Potency
- 3.18 Cell Specialisation
- 3.19 Post-Transcriptional Changes to mRNA
- 3.20 Gene Interaction & Epigenetics
- 3.21 Polygenic Inheritance & Continuous Variation
Topic 4 : Plant Structure and Function, Biodiversity and Conservation
Plant Structure and Function
Plants and Conservation
- 4.7 Plant-Based Products for Sustainability
- 4.8 Water & Inorganic Ions in Plants
- 4.9 Core Practical 8: Determining the Tensile Strength of Plant Fibres
Plant and Bacterial Growth
- 4.10 Bacterial Growth Conditions
- 4.11 Plant Products with Antimicrobial Properties
- 4.12 Core Practical 9: Antimicrobial Properties of Plants
- 4.13 Development of Drugs & Drug Testing
Classification and Biodiversity
Topic 5 – Energy Flow, Ecosystems and the Environment
Photosynthesis
Ecosystem
- 5.9 Ecological Productivity
- 5.10 Energy & Biomass Transfers
- 5.11 Ecology: Key Terms
- 5.12 Factors Affecting Populations
- 5.13 Niche
- 5.14 Core Practical 11: Quadrat & Transect Study
- 5.15 Ecological Succession
Environmental Biology
- 5.16-5.17 Cause and Evidence for Climate Change
- 5.18 Carbon Cycle & Environmental Management
- 5.19 Models for Predicting Climate Change
- 5.20 How Climate Change Affects Species
- 5.21 The Effect of Temperature on Enzyme Reactions
- 5.22 Core Practical 12: Effect of Temperature on Development
- 5.23 Mutation, Natural Selection & Evolution
- 5.24 Isolation & Speciation
- 5.25 Contentious Issues in Environmental Science
- 5.26 Examples of Sustainable Conservation
Topic 6 – Microbiology, Immunity and Forensics
Microbiology
- 6.1 Culturing Microorganisms
- 6.2 Measuring the Growth of Microorganisms
- 6.3 The Bacterial Growth Curve
- 6.4 Core Practical 13: Rate of Growth of Microorganisms
- 6.5 Comparison of Bacterial & Viral Structure
Immunity