Enzymes An enzyme is a protein used to speed up the rate of a chemical reaction. Because they regulate the rate of chemical reactions‚ they are also called catalysts. There are many‚ many different types of enzymes‚ because for each chemical reaction that occurs‚ an enzyme specific to that reaction must be made. To act on a substrate‚ an enzyme must contain an active site. The active site is the area on the enzyme that allows the substrate and enzyme to fit together. The amino acids that are present
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Nellie Greer ABSTRACT Peroxidase is an enzyme found in potatoes that catalyzes the breakdown of hydrogen peroxide‚ H2O2‚ into O2 gas and water. We examined the different pH environments that can affect the enzyme activity during the breakdown of H2O2. In order to do this‚ we added different levels of pH‚ low‚ medium‚ and high‚ into different test tubes with the enzyme and H2O2‚ and we then inverted the tube. The amount of O2 gas produced was then measured and recorded. The result was that the
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Glucose Oxidase and Its Various Uses Aaron Truong Since glucose oxidase has an end product called hydrogen peroxide‚ which is a harmful substance to bacteria‚ it can be used to fight bacteria‚ or sterilize objects (can have various uses such as in hand sanitizers‚ toothpaste‚ soap‚ etc)‚ not just biosensors. Another key part in the reaction would be C6H12O6‚ or glucose. Glucose oxidase can be applied to diabetics as mentioned earlier‚ as biosensors work by "keeping track of the
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Sterling Hayden AP Biology Mrs. Proehl 24 November 2014 I. Title Effect of Differing pH‚ Temperature‚ and Enzyme Concentration on Catalase Reaction Rate II. Introduction Enzymes are used to increase the rate of specific reactions in the body. Catalase‚ a specific enzyme‚ speeds the breakdown of hydrogen peroxide‚ a toxic chemical produced by cells in the body‚ into water and oxygen (Cain and others‚ 2010). The oxygen can be observed as bubbles coming from the reaction site. Catalase is found in many living tissues of organisms
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AN ANALYSIS OF THE BENEFITS AND DRAWBACKS TO TEETH WHITENING AND METHODS OF WHITENING TEETH A Research Report Authorized by Susan D. Painter Director Miss Utah Pageant By Loren Callaway April 14‚ 201 To: Susan D. Painter‚ Director From: Loren Callaway‚ Pageant Assistant Date: April 14‚ 2011 Subject: Presentation of Research Report on An Analysis of the Benefits and Drawbacks to Teeth Whitening And Methods of Whitening Teeth I am pleased
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Effect of Catalyst Ten drops of freshly prepared H2O2 and a pinch of MnO2 were mixed in a test tube. The evolution of gas was noted. The same procedure was done but this time without adding MnO2. The relative rates of gas evolutions in the two systems were then compared. Results Table 1. Effect of the Nature of Reactants on the Rate of Disappearance of Pink Color Reducing Agent | Rate of Disappearanceof Pink Color | Na2C2O4 | slower | H2O2 | faster | Table 2. Effect of the Concentration
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of the 5 minute trial. Interestingly‚ it should also be noted‚ as it was mentioned in the Figure 2‚ that the trend for the 6mL of 3% H2O2(aq) was more of a linear trend than an exponential decay‚ steadily rising until the end of the 5 minute trial. From this‚ it can be inferred that this trial experienced a saturation point for the enzyme (catalase) to substrate (H2O2(aq)) concentration ratio. Thus‚ to truly understand this‚ the trial time period should be extended insofar that a declination in the
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dioxide to oxygen‚ and approximately 3 carboxylations occur per oxygenation. It is interesting to note that photorespiration only occurs in C3 plants where the oxygenase plays its role. It is important because it is a major source of H2O2 in photosynthetic cells. Through H2O2 production and pyridine nucleotide interactions‚ photorespiration makes a key contribution to cellular redox homeostasis. In so doing‚ it influences multiple signaling pathways‚ particularly those that govern plant hormonal responses
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causes it to coagulate and facilitates separating the precipitate from the solution. Potassium oxalate is added to the FeC2O4 precipitate‚ which produces a slightly basic solution for the oxidation of the ferrous ion to the ferric ion‚ by hydroxide‚ H2O2. The following reaction takes place: H2O + HO2- +2Fe2+ 2Fe3+ + 3OH- The OH- ion concentration of the solution is high enough so that some of the Fe3+ reacts with OH- to form ferric hydroxide(brown precipitate) as follows: Fe3+ + 3OH- Fe(OH)3 With
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Effect of Temperature on Peroxidase Ability to Break Down H2O2 By: Rodneika Crutcher Abstract Temperature affects the ability of peroxidase to break down hydrogen peroxide. In this experiment our professor extracted peroxidase from potato tissue. In order to determine how temperature affects peroxidase we created solutions and measured their absorbance levels after water bath treatments. The more absorbent the solution was the less hydrogen peroxide there was in the solution. This means the peroxidase
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