Edexcel IGCSE Biology Exam Questions By Topic

Characteristics of Living Organisms, Common Features: Eukaryotic Organisms, Common Features: Prokaryotic Organisms, Pathogens

Levels of Organisation

Cell Structures, Animal & Plant Cells: Similarities & Differences, Importance of Cell Differentiation, Stem Cells in Medicine: Advantages & Disadvantages

Structure of Biological Molecules, Practical: Food Tests, Role of Enzymes, Temperature & Enzyme Function, Practical: Investigating Temperature & Enzyme Activity, pH & Enzyme Function, Practical: Investigating pH & Enzyme Activity

Diffusion, Osmosis & Active Transport, Factors Affecting the Rate of Movement of Substances, Practical: Investigating Diffusion & Osmosis

The Process of Photosynthesis, Factors Affecting the Rate of Photosynthesis, Leaf: Structure & Adaptations, Plants & Mineral Ions, Practical: Investigating Photosynthesis, Balanced Diet, Human Alimentary Canal: Structure & Function, Peristalsis, Role of Digestive Enzymes, Bile, Small Intestine: Structure & Adaptations, Practical: Energy Content of a Food Sample

Process of Respiration, Aerobic & Anaerobic Respiration, Practical: Investigating Respiration

Gas Exchange in Plants, Leaf Adaptations for Gas Exchange, Gas Exchange: Night vs Day, Practical: The Effect of Light on Gas Exchange in Plants, Structure of the Respiratory System, Role of the Intercostal Muscles & Diaphragm, Alveoli: Adaptations for Gas Exchange, Smoking & the Gas Exchange System, Practical: The Effect of Age on Breathing

The Need for a Transport System, Role of the Xylem & Phloem, Absorption of Water by Root Hair Cells, Transpiration, Practical: Factors Affecting Transpiration, The Blood, White Blood Cells & Immunity, Vaccinations, Platelets & Blood Clotting, Structure & Function of the Heart, Heart Rate & Exercise, Risk Factors for Coronary Heart Disease, Blood Vessels: Structure & Function, Circulatory System: General Structure

Excretion in Plants, Excretion in Humans, Kidney: Excretion & Osmoregulation, Structure of the Urinary System, Nephron Structure, Nephron Function, ADH & Composition of Urine

Response to Changes in the Environment, Homeostasis, Co-ordinating Response, Response to Stimuli: Plants, Nervous & Hormonal Control, Human Nervous System, Role of Neurotransmitters at Synapses, Simple Reflex Arc, The Human Eye: Structure, The Human Eye: Function, The Role of Skin in Temperature Regulation, Hormones: Adrenaline, Insulin, Testosterone, Progesterone & Oestrogen, The Role of Hormones: ADH, FSH & LH

Sexual & Asexual Reproduction: Differences, Gametes & Fertilisation, Adaptations for Pollination, The Process of Fertilisation in Plants, Practical: Conditions for Germination, Germinating Seeds, Asexual Plant Reproduction, Human Reproductive Systems, Roles of Oestrogen & Progesterone in the Menstrual Cycle, Roles of FSH & LH in the menstrual cycle, Role of the Placenta, Amniotic Fluid, Development of Secondary Sexual Characteristics

The Genome & Genes, DNA Structure, RNA Structure, Stages of Protein Synthesis, Alleles, Key Terms in Genetics, Codominance, Polygenic Inheritance, Monohybrid Inheritance: Genetic Diagrams, Family Pedigrees, Sex Chromosomes, Mitosis, Meiosis, Random Fertilisation & Genetic Variation, Diploid vs Haploid, Variation with a Species, Mutation, Mutation: Advanced, Darwin's Theory of Evolution by Natural Selection, Antibiotic Resistance

Population, Community, Habitat & Ecosystem, Practical: Investigating Population Size, Biodiversity, Practical: Investigating the Distribution of Organisms, Abiotic & Biotic Factors

Trophic Levels, Food chains, Food webs & Pyramids, Transfers Along a Food Chain

Carbon Cycle, Nitrogen Cycle

Biological Consequences of Air Pollution, Greenhouse Gases, Enhanced Greenhouse Effect, Biological Consequences of Water Pollution, The Effects of Deforestation

Crop Plants: Glasshouses & Polythene Tunnels, Crop Plants: Increasing Carbon Dioxide & Temperature, Crop Plants: Fertiliser, Crop Plants: Pest Control, Yeast in Food Production, Practical: Investigating Anaerobic Respiration in Yeast, Role of Bacteria in Yoghurt Production, Industrial Fermenters, Fish Farming

Selective Breeding in Plants, Selective Breeding in Animals

The Process of Genetic Modification, Manufacturing Human Insulin, GM Plants & Food Production, Transgenic

Micropropagation, The Production of Cloned Mammals