Enzymes are specific because they ie Enzymatie reactions can be indicated like t
ID: 3504994 • Letter: E
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Enzymes are specific because they ie Enzymatie reactions can be indicated like this: ES E+P In this reaction, E enzyme, ES - enzyme-substrate complex, and P product. ring a degradation reaction, and during a synthesis reaction, substrates are joined to form a er types of reactions also occur in cells. The location where the enzyme and substrate complex is called the active site because the reaction occurs here. At the end of the Planning Ahead o save time, your instructor 6.1. Du Two types of enzymatic reactions in cells are shown in Figure the substrate is broken down to the product(s) product. A number of other reactions also form an enzyme-substrate reaction, the product is released, and the enzyme can then combine with its substrate again. A cell needs only a small amount of an enzyme because enzymes are used over and over. Some enzymes have turnover rates well in excess of a million product molecules per minute may have you start a boiling water bath (page 74 at the begining of the ieboratory. 6.1 Catalase Activity Catalase is involved in a degradation reaction: Catalase speeds the breakdown of hydrogen peroxide (H 0) in nearly all organisms including bacteria, plants and animals. A cellular organelle called a peroxisome, which contains catalase. is present in every plant and animal organ. This means that we could use any plant or animal organ as our source of catalase today. Commonly, school laboratories use the potato as a source of catalase because potatoes are easily obtained and cut up. Catalase performs a useful function in organisms because hydrogen peroxide is harmful to cells. Hydrogen peroxide is a powerful oxidizer that can attack and denature cellular molecules like DNA! Knowing its harmful nature, humans use hydrogen peroxide as a commercii an iseptic to kill germs (Fig. 6.2). In reduced concentration, hydrogeo reroxide is n whitening agent used to bleach hair and teeth. Skillful technicias use it to provide oxygen to aquatic plants and fish, but it is also used industrially to clean most anything from tubs to sewage. It's even put in glow sticks, whese it reacts with a dye Figure 6.2 Hydrogen peroxide Bubbling occurs when you apply hydrogen peroxide to a cut because oxygen is being released when catalase, an enzyme present in the body's cells degrades hydrogen peroxide. O Jill Beaaten, phosographer & Anthony Arera, Chemical Conutan/ Mca-Hl Edecation that then emits light When catalase speeds the breakdown of hydrogen peroxide, water and oxygen are released catalase 2 H,0+O hydrogen peroxide waler oxygen What is the reactant in this reaction? what is the substrate for catalase? What are the products in this reaction, and Why? In the experimental procedure that follows, you will use bubble height to indicate the amount of product per unit ime and therefore enzyme activity. Examine Table 6.1 and hypothesize which tube (1, 2, or 3) will have the reatest bubble column height. Explain your answer bbling occurs as the reaction proceeds. Laboratory 6 How Enzymes Function 6-4Explanation / Answer
The reactant of this reaction is H2O2 and the substrate for catalase is also H2O2..
The products in this reaction are water and oxygen. The bubbling occurs as the reaction proceeds because of oxygen production due to degradation of hydrogen peroxide.
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