Catalase Lab Introduction: Catalase is an enzyme normally found in many plant and animal tissues. Its purpose is to destroy toxic substances which may be introduced into cells. Also‚ some cells use catalase to destroy cellular debris or worn out organelles. In this lab‚ we will use a catalase solution from potatoes and determine the effect of temperature and pH on the action of this enzyme. The substrate of the enzyme will be 3% hydrogen peroxide (H2O2). Catalase works by the following mechanism:
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principle when deciding whether patients with alcoholic liver disease should be considered for transplant. One could argue that by forcing patients to show sobriety for six months we are causing further harm by keeping them from the transplant list as they progress to a more terminal stage. However‚ one could also argue that by helping alcoholic patients with their disease the harm is outweighed by the potential benefit of procuring a liver transplant in the future and increasing their chances of
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temperature range and limited sample size at each group. The experiment also existed two other uncontrolled variables which are the size of liver and the amount of Hydrogen Peroxide‚ hence altering the authenticity of the practical result. At each of the five experimental group‚ there were variations amongst the amount of Hydrogen Peroxide and the size of beef liver‚ which can be a problem because in a well controlled and designed experiment‚ there is only one independent variable. These uncontrolled
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and spread to other organs. This process is referred to as metastasis. Metastases are the major cause of death from cancer. Key facts: Cancers figure among the leading causes of death worldwide‚ accounting for 8.2 million deaths in 2012 . Lung‚ liver‚ stomach‚ colorectal and breast cancers cause the most cancer deaths each year. The most frequent types of cancer differ between men and women. About 30% of cancer deaths are due to the five leading behavioral and dietary risks: high body mass index
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research paper is about Hepatitis C (HCV) causes inflammation of the liver and can cause liver damage foremost to cirrhosis. Irregularly‚ liver cancer may grow. First called non-A and non-B hepatitis‚ hepatitis C (HCV) was discovered in the early 1970’s‚ but it was not until 1989 that testing for particular antibodies to the virus initiated. Each year‚ 16‚000 Americans contract hepatitis C‚ which is a more common cause of prolonged liver disease than hepatitis B. roughly guessed the rate as high as 80%
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A common enzyme that we have is catalase‚ which breaks down hydrogen peroxide into the products water and oxygen. To observe this catalase activity I used small amounts of liver samples slightly smaller than the size of a pea to see the reaction when hydrogen peroxide is added to it. In this experiment I exposed the liver samples in three different temperature environments: 3°c‚ 22°c‚ and 75°c. I wanted to measure how much water and oxygen is produced in each environment by measuring the visible
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Simple Experiments on the Enzyme Catalase Aim: The aim of this practical is to use three different techniques to investigate the effect of different concentrations of the enzyme catalase on the rate of breakdown of hydrogen peroxide. Background information Catalase is an enzyme which is found in all living organisms. This enzyme catalases the decomposition of hydrogen peroxide into water and oxygen. Cells continually produce a poisonous by-product of metabolising‚ called hydrogen peroxide. This
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noticeable symptoms for as long as one to two decades after they are infected. In fact‚ by the time symptoms appear‚ the virus has probably already begun to damage the liver. If the liver is injured and stops functioning‚ death will always be the outcome (Lieber). Liver failure from chronic hepatitis C is one of the most common causes of liver transplants in the United States. Hepatitis C is an inflammation of the liver’s cells and tissues caused by the hepatitis C virus (HCV). Hepatitis C virus is
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Catalase Experiment Research Question: How does the weight of a piece of liver (0.4g‚ 0.8g‚ 1.2g and 1.6g in this case) affect the amount of gas created after 2 minutes when combined with hydrogen peroxide? Aim: To see find out how the amount of catalase correlates with the amount of gas created when in combination with hydrogen peroxide. Materials: 15g of liver 25 ml of hydrogen peroxide 1 scale 1 bucket 1 100ml graduated cylinder 1 250ml flask with bung 1 50cm tube (able to fix onto top of flask)
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highly trained cyclists and their livers. For the experiment‚ Swiss and British researchers directed the cyclists‚ all men‚ to ride to exhaustion on several different occasions. After each ride‚ they swallowed drinks sweetened with fructose or glucose‚ another simple sugar often identified as dextrose on ingredient labels. (Some also drank a milk-sugar sweetener.) RELATED * More Phys Ed columns * Faster‚ Higher‚ Stronger * Fitness and Nutrition News The liver is often overlooked when we consider
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