If you describe a person as being a catalyst in an argument they are causing it. In science a catalyst is something that speeds up a chemical reaction.  Biological catalyst are called enzymes. Enzymes are of utmost importance to organisms: without enzymes you would be dead.          

                                                                                                                                                        There are many, many different enzymes in existence. The reason that there are so many different enzymes is that they are specific: one enzyme only speeds up one type of reaction.     

                                                                                                                                         A good example of enzymes in action is found in the breakdown of hydrogen peroxide. Hydrogen Peroxide (H₂O₂) slowly gives up an oxygen atom in every molecule to form water (H₂O). This process is painfully slow and can take several weeks. However if you add the enzyme catalyse it will speed the process up to a matter of minutes.

There are two types of enzymes:

·         Synthesis enzymes – they make small things into bigger things

·         Breakdown enzymes – these break big molecules down into smaller molecules (this happens in digestion)