Rates Of Reaction
- Enzymes are biological catalysts. They increase the rate of chemical reactions inside and outside cells.
- Enzymes are specific in their action- each enzyme only catalyses a particular chemical reaction or type of chemical reaction.
- During digestion, enzymes break down large insoluble food molecules into smaller, soluble ones that can dissolve into blood.
How Enzymes Work
- This diagram shows how an enzyme works. The substrate binds to a part of the enzyme called the active site.
- Notice how they fit together like a lock and key. An enzyme will only catalyse a particular reaction when the shape of its active site matches the shape of the substrate molecule.
- The enzyme catalyses the breakdown of the substrate into the products, which then leave the enzyme. The enzyme is then free to join…