CATALASE Catalase is a common enzyme found in nearly all living organisms exposed to oxygen. It catalyzes the decomposition of hydrogen peroxide to water and oxygen. It is a very important enzyme in reproductive reactions. Likewise‚ catalase has one of the highest turnover numbers of all enzymes; one catalase molecule can convert millions of molecules of hydrogen peroxide to water and oxygen each second. Catalase is a tetramer of four polypeptide chains‚ each over 500 amino acids long. It contains
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Chapter 1 INTRODUCTION 1.1 Background of study Macrobrachium rosernbergii‚ also known as the giant river prawn is much known as a species in the Southern and Southeastern Asia‚ Western Pacific Island and Northern Oceania. This species lives inland of the freshwater areas during adult stage while the larvae needs brackish water and usually found in estuaries (Galitzine and Morgan‚ 2009). This species of prawn is a tropical living animal which needs warmer temperatures more than 18°C for growth
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Factors Affecting the Rate of Enzyme Activity Justin Hunter G. Kim September 16‚ 2011 September 26‚ 2011 Abstract Catalase is a common enzyme found in nearly all living organisms that is frequently used by cells to rapidly catalyze the decomposition of hydrogen peroxide into less reactive oxygen and water molecules. Catalase is a protein that is most commonly found in the liver. The purpose of this experiment was to determine the effect that changes in temperature and pH have on the function
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Practical Report: Background Information: Hydrogen peroxide (H2O2) is a combination of hydrogen and oxygen. In high concentrations‚ it can be unstable and even poisonous. In lower concentrations‚ such as the types found in many homes‚ it works well as a disinfectant and antiseptic.The reason behind foaming of Hydrogen peroxide is because blood and cells contain an enzyme called catalase. Since a cut or scrape contains both blood and damaged cells‚ there is lots of catalase floating around.When
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¬¬¬¬¬¬04/28/2010 Monday & Wednesday 7:40-10:30 Experiment #2 – Kinetics of the Decomposition of Hydrogen Peroxide Introduction: Chemical reactions are dependent upon two factors: temperature and concentrations of substance. We can monitor the rate at which a chemical decomposes or the rate at which a chemical substance appears. In this experiment we will be measuring the rate of decomposition of hydrogen dioxide with the following reaction: 2 H202 (aq) 4 2 H20 (l) + 02 (g) We can trap the
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Quan Chapter 15: Redox Titrations 1. (A) Which of the following is true of a redox titration? (i) Since the redox reaction is spontaneous‚ the equilibrium constant does not have to be large for an effective titration. (ii) The titration effectiveness is increased when the two half-reaction potentials are far apart. (iii) Without an indicator the equivalence point cannot be detected. (iv) For an effective redox titration‚ the reducing agent must always be in the buret. (v) The equivalence
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shown as 2H2O2 = 2H2O + O2 (Keilin and Hartree 397). The reaction involves primarily the adsorption of hydrogen peroxide at the catalase surface. The decomposition of hydrogen peroxide by catalase is regarded as involving
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hydrogen peroxide‚ we can observe how enzymes like catalase work to perform the breaking down‚ of other substances. We will look at enzymes and catalase and its substrate hydrogen peroxide. Catalase accelerates the breakdown of hydrogen peroxide (H2O2) into water
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OBJECTIVE: The experiment was carried out to investigate the effects of the increase in the enzyme concentration on the rate of reaction. By using self investigative and experimental skills‚ the experiment was done in order to determine how the rate of reaction will be altered‚ whether it will increase‚ decrease or remain constant when the different concentration of enzymes added. INTRODUCTION: Enzymes are produced naturally in plant‚ animal‚ and microbial cell. There are thousands of different
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I. Aim The aim of the three experiments is actually to investigate the effects of different factors such as temperature‚ pH‚ and concentration of substrate‚ on the activity of the enzymes. By conducting these three separate experiments also‚ three graphs are able to be obtained where the trend of each factor affecting on the enzyme activity is shown and described clearly. II. Hypothesis Experiment 1 (Effect of Temperature): As the temperature increases‚ the height of the bubble will increase
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