# Enzymes

Source: https://projectgcse.co.uk/biology/human_biology/enzymes

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- Enzymes have much the same job as catalysts.
- They speed up biological reactions and like enzymes they are not used up in the process.
- They are specific to a certain kind of reaction.
- They work harder the higher the temperature but have a cut off point like catalysts.
- Because enzymes are specific, different ones work best at different pHs.