Key Concepts in Biology

Cell Structure

Eukaryotic Organisms

Eukaryotic Organisms: Animals & Plants

Eukaryotic Organisms: Fungi & Protoctists

Prokaryotic Organisms

Specialised Cells

Microscopy

Practical: Microscopy

Using Units

Enzymes

The Action of Enzymes

Factors Affecting Enzymes

Practical: Enzymes & pH

Rate Calculations for Enzyme Activity

Enzymes as Biological Catalysts

Movement of Substances Into & Out of Cells

Diffusion

Osmosis

Active Transport

Cells & Control

Cell Division

Mitosis

Uncontrolled Cell Division

Growth in Organisms

Growth

The Importance of Cell Differentiation

Stem Cells

Animal Stem Cells

Plant Stem Cells

Stem Cells In Medicine

Co-ordination & Response

The Human Nervous System

Synapses

Simple Reflex Arc

Genetics

Reproduction

The Role of Meiosis

DNA & the Genome

Inheritance

Key Definitions

Predicting Genetic Inheritance

Inheritance of Sex

Polygenic Inheritance

Variation

Mutations

Natural Selection & Genetic Modification

Natural Selection & Evolution

Evolution by Natural Selection

Evidence of Evolution

The Three Domains

Genetic Modification

Selective Breeding

Genetic Engineering

The Process of Genetic Engineering

Evaluating the Use of Genetic Engineering

The Human Genome Project

Health, Disease & the Development of Medicines

Disease

Health & Disease

Pathogens

Common Infections

Defence Against Disease

Human Defence Responses

Immunity

Vaccination

Development of Medicines

Antibiotics

Discovery & Development of New Drugs

Lifestyle & Non-Communicable Disease

Cardiovascular Disease

Plant Structures & their Functions

Photosynthesis

Photosynthesis

Limiting Factors

Light & the Rate of Photosynthesis

Practical: Investigating Light & Photosynthesis

Plant Structure

Root Hair Cells

Xylem & Phloem

Transport in Plants

Transport of Water & Mineral Ions

Factors Affecting the Rate of Water Uptake

Translocation

Animal Coordination, Control & Homeostasis

Animal Hormones

The Endocrine System

Adrenaline

Thyroxine

Hormones & the Menstrual Cycle

Contraception

Hormones & Assisted Reproductive Technology

Homeostasis

Importance of Homeostasis

Regulating Blood Glucose Concentration

Diabetes

Exchange & Transport in Animals

Transport in Animals

The Need for Transport

Respiration

Respiration

Practical: Investigating Respiration

Gas Exchange

Adaptations of the Alveoli

Circulatory System

The Blood & Blood Vessels

The Circulatory System

Ecosystems & Material Cycles

The Organism in the Environment

Key Terms in Ecology

Abiotic & Biotic Factors

Interdependence

Parasitism & Mutualism

Biodiversity

Sampling Organisms

Feeding Relationships

Trophic Levels & Food Chains

Food Webs

Food Pyramids

Cycles within Ecosystems

The Water Cycle

The Carbon Cycle

The Nitrogen Cycle

Human Influences on the Environment

Human Impact on Biodiversity

Benefits of Maintaining Biodiversity

Exam boards

• Edexcel GCSE Combined Science: Chemistry
• Edexcel GCSE Combined Science: Physics
• OCR GCSE Combined Science A (Gateway): Biology
• OCR GCSE Combined Science A (Gateway): Chemistry
• OCR GCSE Combined Science A (Gateway): Physics

Study tools

• Edexcel GCSE Combined Science · Exam Questions
• Edexcel GCSE Combined Science · Past Papers

Related links

• GCSE Science · Revision Notes
• GCSE Science · Exam Questions
• GCSE Science · Past Papers