Organisation — GCSE Revision Notes

2 notes on Organisation for GCSE Biology.

EnzymesEnzymes are biological catalysts — proteins that speed up chemical… The Heart and Circulatory SystemHumans have a double circulatory system: the heart pumps blood on two…

What these notes cover

Enzymes — What enzymes are; How enzymes work — the lock and key model; Factors affecting enzyme activity; Digestive enzymes
The Heart and Circulatory System — The circulatory system; The heart; The blood vessels; The blood; Coronary heart disease

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