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Enzymes
Chemical Reactions
Chemical reactions can only take place when different particles collide with enough energy to react.
The minimum amount of energy particles must have to be able to react is known as the activation
energy.
Many chemical reactions take place in living cells. These have to be carried…

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together will break. This destroys the enzyme's special shape and so it won't work any more. This
means it has denatured.
Enzymes in the human body normally work best at around 37°C ­ body temperature.

The pH also affects enzymes. If it's too high or too low, the pH
interferes…

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Bile:
- Bile is produced in the liver. It's stored in the gall bladder before it's releasing into the small intestine.
- The hydrochloric acid in the stomach makes the pH too acidic for enzymes in the small intestine to
work properly. Bile is alkaline ­ it neutralises the acid…

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Uses of Enzymes
Enzyme Use
Protease Used to predigest proteins during the manufacture of baby foods.
Used together with protease in biological detergents to break down digest the
Lipase
substances in stains into smaller, water soluble substances.
Used to convert starch syrup, which is relatively cheap, into sugar syrup, which…

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