"Enzyme" Essays and Research Papers

Reactions Enzymes are proteins found in living things that speed up chemical reactions. They aid in nearly all metabolic processes, such as food digestion, molecule synthesis, and the storage/ release of energy. An enzyme speeds up the rate of the chemical reactions by lowering the reaction’s activation energy, which means that by definition, an enzyme functions as biological catalyst. The activation energy is the energy that is used to get a reaction started. The function of an enzyme is dependent...

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There are approximately 40,000 enzymes living in one human cell, each responsible for a chemical reaction. Enzymes are complex 3D protein molecules created by amino acids, forming a unique sequence that produces hydrogen bonds, eventually formulating an enzyme within plants and animals (Boyle & Senior, 2002). Working alongside other molecules, they uphold a stable reaction system. The function of an enzyme is to aid and increase chemical reactions and organise metabolism, while maintaining homeostasis...

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amylase and starch. Introduction The enzyme amylase is found in the human body, it catalyses the hydrolosis of internal glycosidic bonds in polysaccharides, the breakdown of starch into sugars. Amylase is present in human saliva, where it initiates the chemical process of digestion. Enzymes work best at an optimum pH of 7 which is the bodies normal pH. The pH affects the charge of the amino acid at the active site. PH changes affect the structure of an enzyme molecule and therefore affect its ability...

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Enzyme Catalysis Lab Problem: Before the lab, one should understand: • The general functions and activities of enzymes; • The relationship between the structure and function of enzymes • The concept of initial reaction rates of enzymes; • How the concept of free energy relates to enzyme activity; • That change in temperature, pH, enzyme concentration, and substrate concentration can affect the initial reaction rates of enzyme-catalyzed reactions; and • Catalyst, catalysis, and catalase...

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Enzyme as protein Dr.Samina Haq Quantitative and qualitative test for protein and amino acids • 1. 2. 3. 4. 5. 6. Qualitative test Ninhydrin test Biuret test Xanthoproteic test Millons test Hopkins-cole test Nitroprusside test Quantitative test 1. 2. 3. Spectrophotometric assay Protein shows maximum absorbance at 280nm due to presence of tyrosine and tryptophane. Biuret test shows 540nm Lowry test shows 750nm Ninhydrin Test • Amino acid containing a free...

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it's lowest to do so. However, in cold solutions the starch will take longer as it will in temperatures beyond 40 degrees. Once it reaches this point, the break down will either take a very long period of time or have no reaction at all as enzymes are denatured at a certain point. Materials: · 4 x test tubes · 5mL Diastase · 5mL Water · 10mL 2% Starch Suspension. · Pipette · 2 x Spotting tiles · Large Beaker filled with water of assigned temperature · Thermometer...

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Biology “Enzyme Activities” Introduction: Enzymes have extremely interesting properties that make them little chemical-reaction machines. The purpose of an enzyme in a cell is to allow the cell to carry out chemical reactions very quickly. These reactions allow the cell to build things or take things apart as needed. This is how a cell grows and reproduces. At the most basic level, a cell is really a little bag full of chemical reactions that are made possible by enzymes (Brain). Laboratory...

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milk Introduction Enzymes are globular protein, responsible for most of the chemical activities of living organisms. They are made up of long chains of amino acids containing carbon, hydrogen, oxygen and nitrogen (Gunsch, 2012). The role of enzyme is to act as catalysts, substances that speed up chemical reactions without being chemically altered during the process. The speeding up of chemical reactions is done by lowering the activation energy required to start a reaction. Enzymes are specific in...

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LABORATORY REPORT Activity: Enzyme Activity Name: Angela Collins Instructor: Catherine Rice Date: 07.09.2014 Predictions Sucrase will have the greatest activity at pH 5 Sucrase will have the greatest activity at 70 °C (158 °F) Sucrase activity increases with increasing sucrose concentration Materials and Methods Effect of pH on Enzyme Activity Dependent Variable amount of product (glucose and fructose) produced Independent Variable pH Controlled Variables temperature, amount...

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Procedures for Part A: For Activity A, we first tested enzyme activity. First, we used an H2O2 syringe to transfer 10 mL of H2O2 into an unlabeled 60-mL cup. Then, we used a transfer pipet to add one mL of catalase solution into the unlabeled 60-mL cup that we put H2O2 in. After that, we observed the solution for one minute. Then we tested the effect of boiling on enzyme activity. First we used a transfer pipet to transfer 4 mL of catalase into a test tube. After that, we placed the test tube filled...

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