BiologyPearson Edexcel · 4BI1
International GCSE Biology Formula Sheet
This biology formula sheet follows the Pearson Edexcel International GCSE Biology (4BI1) specification, which asks you to know the word and balanced symbol equations for photosynthesis and aerobic respiration, and the word equations for anaerobic respiration in plants and animals.
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- 7 formulas
- 2 sections
- Checked 22 October 2026
Equations to know
Specification points 2.19, 2.37 and 2.38.
- Photosynthesis (word equation, needs light and chlorophyll)
- Photosynthesis (balanced equation)
- Aerobic respiration (word equation)
- Aerobic respiration (balanced equation)
- Anaerobic respiration in plants
- Anaerobic respiration in animals
Energy transfer
Specification point 4.9.
- Energy passed to the next trophic level
Based on the Pearson Edexcel International GCSE Biology (4BI1) specification (Issue 3) (official source), checked 22 October 2026. Always check the formula list printed in your own exam paper.
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