Enzymes
- Created by: alexda
- Created on: 25-02-15 20:17
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- Enzymes
- Enzymes are soluble protein molecules and are described as biological catalysts.
- A catalyst is a substance which increases the speed of a reaction by lowering the activation energy of the reaction. A catalyst does not change and is never used up in a reaction.
- Enzymes catalyse chemical reactions inside and outside cells. For example:
- Enzymes are highly specific for their substrate.
- The substrate molecule has to fit the active site for a chemical reaction to be catalysed.
- This is referred to as the 'lock and key' mechanism because just like only one key can open a lock, only one type of enzyme will catalyse a specific reaction.
- The substrate molecule has to fit the active site for a chemical reaction to be catalysed.
- Enzymes are soluble protein molecules and are described as biological catalysts.
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