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The Effect of Concentration on Pectinase Using Apple Hypothesis: As the concentration of pectinase added to apple pulp increases, the faster the rate at which apple juice is produced. Introduction: Enzymes are proteins that speed up and control certain reactions. They work by the substrate molecule binding with the enzyme to form an enzyme-substrate complex. Each enzyme molecule has an active site, where the substrate molecules become attached. The tertiary structure of the protein gives a certain shape to the enzyme and active site and therefore means that only certain shape substrate molecules will fit. This explains the specificity of enzymes. Pectinases are a group of enzymes that specifically target pectins, which are polysaccharides that are found in plant cell wall structure. If the shape of pectinase was like this: The shape of pectin would be like this: This is a section of pectin showing that it is a polymer made up of several galacturonic acid...

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