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GCSEEdexcel
Combined Science
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Levels of organisation: cells to tissues, organs and systems Eukaryotic vs prokaryotic cells Animal cell structures and functions Plant cell structures and functions Bacterial cell structures and plasmids Specialised cells and adaptations Microscopy basics: magnification and resolution Core Practical: Microscopy, magnification calculations and biological drawings Calculating magnification and image size Enzymes as biological catalysts The lock-and-key idea and enzyme specificity Denaturation and why temperature/pH affect enzymes Core Practical: Effect of pH on enzyme activity Calculating rates of enzyme activity from data Diffusion in cells: what affects rate Osmosis and water potential (GCSE level) Active transport: why cells need energy Core Practical: Osmosis in potatoes (percent mass change) Interpreting osmosis results and evaluating method
