Most chemical catalysts catalyse a wide range of reactions. They are not usually very selective. Do enzymes have an effect on activation energy proteins in enzymes are usually globular. For two molecules to react they must collide with one another. An enzyme-catalysed reaction takes a different ‘route’.
This is the simplest model to represent how an enzyme works. Each enzyme works within quite a small pH range. They block or distort the active site. Pectinase is used to produce and clarify fruit juices.
Enzymes can be immobilized by fixing them to a solid surface. Pearson, as an active contributor to the biology learning community, is pleased to provide free access to the Classic edition of The Biology Place to all educators and their students. The purpose of the activities is to help you review material you have already studied in class or have read in your text. Some of the material will extend your knowledge beyond your classwork or textbook reading.