Enzyme Action
- Created by: jessicawarren
- Created on: 17-03-16 09:16
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- Enzyme Action
- Catalysts
- Biological catalysts, catalyse metabolic reactions
- Can affect structures (e.g. production of collagen) and functions (e.g. respiration) in an organism
- Enzyme action can be intracellular (inside cells) /extracellular (outside cells)
- Proteins
- Have an active site with a specific shape
- Substrate binds to active site
- Highly specific due to tertiary structure
- Activation energy
- Enzymes lower activation energy
- Reaction can happen at lower temperature
- Speeds up ROR
- When substrate binds to active site, enzyme-substrate complex formed
- Induced Fit Model
- Enzyme genral shape
- Substrate similar shape to active site
- Enzyme moulds to shape of substrate
- Alters bonds in active site
- Properties
- Usually only catalyse one reaction
- Only one complementary substrate will fit active site
- Shape of active site determined by tertiary structure
- Shape of active site will change if tertiary structure altered. Substrate won't fit, E-S complex not formed
- Tertiary structure altered by changes in pH or temperature
- Primary structure determined by gene. Mutation could result in change in tertiary structure
- Catalysts
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