B4 - Enzymes
- Created by: Ajensen776
- Created on: 07-04-14 00:25
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- Enzymes
- Enzymes are proteins produced by living things
- Living things have lots of chemical reactions going on inside them all the time
- These reactions need to be carefully controlled
- To get the right amounts of substances
- living things produce enzymes
- Enzymes Speed up chemical reactions
- Enzymes are specific
- 1. Chemical reactions involve things being split apart or joined together
- 2. Substrates is a molecule that is changed in a reaction
- 3. Every Enzyme has an active site that a substrate will join onto
- 4. Enzymes only speed up one reaction. This is because a substrate has to be the correct shape to fit into the active site
- Enzymes need the right temperature and pH
- If you change the temperature, you change the rate of reaction
- At first a higher temperature will increase the rate
- However if it gets too hot some of the bonds holding the enzymes will break
- This changes the active sites shape and the substrate will no longer fit
- when this happens to an enzyme is is known as becoming denatured
- This changes the active sites shape and the substrate will no longer fit
- However if it gets too hot some of the bonds holding the enzymes will break
- Enzymes also have an optimum pH that they wok best at
- if the pH is too high or low it interferes with the bonds holding the enzymes together
- This changes the shape of the active site and denatures the enzyme
- if the pH is too high or low it interferes with the bonds holding the enzymes together
- Enzymes are proteins produced by living things
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