Catalase Inhibition Effect of Zinc Sulphate on

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CATALASE INHIBITION EFFECT OF ZINC SULPHATE ON THE RATE OF CATALASE REACTION Practically all of the intricate biochemical reactions that occur in all organisms are regulated by enzymes. Enzymes are proteins that speed up chemical reactions in cells. They break down molecules called substrates. Each enzyme has only one substrate that it breaks down. They have a globular shape, and a complex 3-D structure. Enzymes are specific for which reactions they will catalyse, and the specificity depends on their 3-D shape. Enzymes are reusable. The rate of enzyme activity is influenced by an increase in temperature, which will make molecules move faster. The PH, substrate concentration, cofactors and coenzymes and enzyme inhibitors. For most enzymes the optimum temp is about 37 degrees, our body temperature. Some are a lot lower and there are even some bacteria that can withstand temperatures up to 100 degrees. Most enzymes however are fully denatured at 70 degrees. Each enzymes active site is suitable for one specific type of substrate. The shape and the chemical environment inside the active site permits a chemical reaction to proceed more easily. This is very much like the simple way, as a key fits into a lock very precisely. The key is analogous to the enzyme and the substrate analogous to the lock. Once formed, they are released from the active site, leaving it free to become attached to another substrate. This is known as the lock and key hypothesis. Some proteins can change their shape. When a substrate joins with an enzyme, it induces a change in the enzymes conformation. The active site is then shaped into a accurate conformation making the chemical environment appropriate for the

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