Edexcel AS Biology (A) SNAB
Exam Questions

The Need for a Circulatory System, The Importance of Water in Transport, Mammalian Heart: Structure & Function, Blood Vessels: Structure & Function, Cardiac Cycle, Investigating Heart Rate, Atherosclerosis, Blood Clotting

Cardiovascular Disease, Interpreting Data on Risk Factors, Treatment of CVD, Energy Budgets & Diet, Monosaccharides, The Glycosidic Bond, Disaccharides, Polysaccharides, Lipids & Ester Bonds, Reducing Risk Factors of CVD, Practical: Vitamin C Content

Properties of Gas Exchange Surfaces, Fick's Law of Diffusion, The Mammalian Lung, Cell Membranes, Practical: Investigating Membrane Structure & Permeability, Diffusion & Facilitated Diffusion, Active Transport, Osmosis

Nucleotides & Phosphodiester Bonds, DNA: Structure, RNA: Structure

Transcription, Translation, Nature of the Genetic Code, Amino Acids & Peptide Bonds, Levels of Protein Structure, Globular Proteins: Structure & Function, Fibrous Proteins: Structure & Function, The Role of Enzymes, Mode of Enzyme Action, Practical: Investigating the Effect Enzyme and Substrate Concentrations

DNA Replication, Mutations, Inheritance: Key Terms, Pedigree Diagrams, Monohybrid Crosses, Chi-squared Test, Genetic Screening

Cell Theory, Eukaryotic Cells, Prokaryotic Cells, Organisation of Cells, Microscopy, Magnification Calculations, Recognising Organelles

The Cell Cycle, Mitosis, Practical: Identifying Mitosis in Plant Cells

Mammalian Gametes, Fertilisation in Mammals, Genes & Linkage, Meiosis: Source of Genetic Variation

Stem Cells, Stem Cells in Medicine, Cell Differentiation, Epigenetics, Phenotypes & Variation

The Variety of Life, Measuring Biodiversity Within a Habitat, Comparing Biodiversity Between Habitats, Ecological Niches & Adaptations, Natural Selection, Hardy-Weinberg Equation, Reproductive Isolation, Classification, Conservation of Biodiversity

Plant Cell Structure, Plant Stems, Importance of Water & Inorganic Ions to Plants, Starch & Cellulose: Structure & Function, Plant Fibres, Practical: Identifying Tissue Types Within Stems, Practical: Determining the Tensile Strength of Plant Fibres, Development of Drug Testing, Antimicrobial Properties of Plants, Sustainability & Plant Materials