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Edexcel International GCSE Biology Course Notes

These revision notes cover the full International GCSE Biology course. Start with the course overview, then move through the topic-area hubs, detailed topic pages, interactive revision tools, practical reference page and glossary.

Start Here

  • Overview: Course structure, assessment pattern and topic map.
  • Course Map: Open the full course map.

Most interactives sit inside the topic pages. These are a few strong visual entry points if you want to start there.

  • Comparative Cell Structures: Compare plant and animal cells and highlight which organelles are shared or plant-only.
  • Plant Cell Osmosis: Compare hypertonic, isotonic and hypotonic surroundings and watch how vacuole size, turgor and plasmolysis change.
  • Leaf Cross-Section: Use a labelled leaf model to connect palisade cells, air spaces, stomata and vascular tissue to function.
  • Photosynthesis Rate and Light Intensity: Model the pondweed practical so bubble rate can be compared against lamp distance and relative light intensity.