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    Investigating the effect of different environmental factors on the reaction of liver and hydrogen peroxide Table of Contents 1 Design 3 1.1 Variables 3 1.2 Safety and Environment 3 2 Data Collection and Analysis 3 2.1 Collected Raw Data 3 2.2 Qualitative data 5 2.3 Processed Data 5 2.4 Graph on test tube 2 5 2.5 Graph on test tube 3 6 2.6 Errors 6 3. Conclusion and Evaluation 6 3.1. Conclusion 6 3.2. Evaluation 7 3.2.1. Random Errors 7 3.2.2. Systematic Errors 7 3.3. Improvements

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    and help combine or break down hydrogen peroxide. Imagine a pen with ink inside it‚ when you write‚ ink comes out‚ right? You can draw‚ you can write‚ then when you finish and get your pen off of the paper‚ the ink stops coming out. Enzymes are like that‚ they grab on to one or two pieces‚ do something to them‚ and then release them‚ but instead the pen holds the ink in. Catalase and Catalyst Catalyst is a chemical‚ which can break down hydrogen peroxide to water and oxygen. Catalase

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    Introduction : Solanum nigrum Linn. commonly known as Black Nightshade is a dicot weed in the Solanaceae family. Other names of S. nigrum are European Black Nightshade or just black nightshade‚ Duscle‚ Garden Nightshade‚ Hound’s Berry‚ Petty Morel‚ Wonder Berry‚ Small-fruited black nightshade. It is a species of the Solanum genus‚ native to Eurasia and introduced in the Americas‚ Australia‚ Asia and South Africa. The plant is cultivated as a food crop‚ both for its fruit and its leaves in some

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    Extracellular enzymes act outside producer cells e.g. digestive enzymes. Chemical composition * Enzymes are proteins made of amino acids linked and folded to produce a 3D structure specific to a certain substrate * Composed of carbon‚ hydrogen‚ oxygen and nitrogen * Each enzyme catalyses a distinct chemical reaction in which it combines with the substrate to form an enzyme substrate molecule upon which the substrate is broken down * One model used to illustrate the action of an

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    breaking apart‚ is sped up. An enzyme breaks apart the substrate in the active site of the enzyme; this is where the magic happens. Substrate is what is being broken apart by the enzyme. In this case‚ the enzyme is catalase and the substrate is hydrogen peroxide‚ or 2H2O2. As the catalase and the substrate interact‚ the substrate is brought into the catalase and broken apart into water and oxygen. This process may be able to happen naturally‚ but the enzyme‚ catalase‚ speeds up the process.

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    in tact. When substances enter the body that are foreign‚ the body fights to get rid of these toxins. For example‚ hydrogen peroxide is toxic to cells‚ so it is important for the cell to get rid of it. Enzymes are in control of converting reactions into products. The enzyme peroxidase works to destroy the hydrogen peroxide in the cell. It does this by converting the hydrogen peroxide into oxygen and water. Peroxidase releases oxygen during the procedure. When the rate of how much oxygen is being

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    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 of the enzyme catalase

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    beakers A dozen filter paper disks Test tube rack Hydrogen peroxide (H2O2) Potato extract Forceps Thermometer Hot plate Large beaker Ice cubes Graduated cylinder Stopwatch Procedure: Step 1 Place 10 mL of potato extract in a small beaker and check the temperature to ensure that it is at room temperature (20-25°C). Step 2 Using forceps dip a filter paper disk into the extract and drop it into the test tube with 10mL of hydrogen peroxide. Step 3 Allow the filter paper disk to sink to the

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    Writing ionic equations for redox reactions You can split the ionic equation into two parts‚ and look at it from the point of view of the magnesium and of the copper(II) ions separately. This shows clearly that the magnesium has lost two electrons‚ and the copper(II) ions have gained them. These two equations are described as "electron-half-equations" or "half-equations" or "ionic-half-equations" or "half-reactions" - lots of variations all meaning exactly the same thing! Any redox reaction

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    extracted catalase from potatoes by peeling‚ cutting‚ and blending them. The extract was then used for make solutions of different concentrations or percentage. After coffee filters were soaked in the solutions‚ they were put into the substrate‚ hydrogen peroxide‚ and timed for how long they took to rise. This would be the reaction rate. As Kartinen expected‚ the concentration of 100% was fastest‚ 90% second-fastest‚ and so on. This happened due to the pH of the solution and how it affected the reaction

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