. Enzymes are proteins that act as biological catalysts within living cells and allow for reactions to occur. An enzyme will bind to a reactant which is known as a substrate and when they bind they might change shape. Fermentation is a process in which a substance breaks down into a simpler substance that bind and undergo chemical reactions. There are several environmental conditions that may affect enzyme activity. Temperature increases the rate of reaction forming more product. A change in PH- Acid will decrease the rate of the reaction and change the shape of the substrate. Also Concentration will increase the rate of the reaction. Fermentation occurs without the use of oxygen. Cellular respiration consists if this chemical reaction C6H12O6
