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Your search returned 200 essays for "enzymes":
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The Effect Of Substrate Concentration On The Activity Of The Enzyme Catalase - The Effect Of Substrate Concentration On The Activity Of The Enzyme Catalase A Level Biology Project Aims This is an experiment to examine how the concentration of the substrate hydrogen peroxide affects the rate of reaction of the enzyme catalase. Introduction This is a real A-level school project and as such is intended for educational or research purposes only. Extracts of this project must not be included in any projects that you submit for marking. Doing this could lead to being disqualified from all the subjects that you are taking....   [tags: biology experiment, chemistry experiment] 2003 words
(5.7 pages)
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Temperature's Effect on the Production of Oxygen From Yeast and Hydrogen Peroxide - Temperature's Effect on the Production of Oxygen From Yeast and Hydrogen Peroxide Planning Aim --- My aim is to discover how temperature effects the production of oxygen from yeast and hydrogen peroxide. I will mix yeast with hydrogen peroxide and use an upturned measuring cylinder to measure how much oxygen is produced. To find out how much hydrogen peroxide and yeast I will use, I will carry out pre-tests....   [tags: Papers] 2104 words
(6 pages)
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Activity of the Enzyme Catalase with Hydrogen Peroxide - Activity of the Enzyme Catalase with Hydrogen Peroxide Background Information: An enzyme (Catalase) is a biological catalyst. It can modify the rate of reaction without being changed itself. Enzymes are also globular proteins that have a three-dimensional specific shape; among with a pocket known as the active site, this has a precise shape to link with the exact substrate. Every enzyme are capable of converting one kind of substrate molecule into one kind of product molecule, which forms the enzyme-substrate complex....   [tags: Papers] 2153 words
(6.2 pages)
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The Effect of pH on the Activity of Catalase - The Effect of pH on the Activity of Catalase Secondary resources: from my research I carried out, I have learnt that: Catalyse is an enzyme that is found in foods such as potato and liver. Catalyse speeds up the decomposition of hydrogen peroxide into water because the shape of the hydrogen peroxide molecule. This type of where a molecule is broken down into smaller pieces is called an anabolic reaction. This enzyme catalysis is the breakdown of hydrogen peroxide and it forms oxygen gas and water....   [tags: Papers] 2174 words
(6.2 pages)
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Enzymes Investigation - Enzymes Investigation In this investigation, I will assess how changing the concentration of substrate affects the rate at which an enzyme-catalysed reaction occurs. An enzyme is a biological catalyst. It speeds up a reaction but does not react itself. Enzymes usually catalyse the breakdown of substances into less complex substances. The substance an enzyme acts on is known as the substrate. Each enzyme is specific to one substrate. Enzymes work best in specific conditions of temperature and pH....   [tags: Papers] 2251 words
(6.4 pages)
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Rate of Reaction Using Enzymes - Rate of Reaction Using Enzymes In this bit of coursework I will be investigating the rate of reaction in which enzymes are the catalyst breaking down a substrate. The substrate I am going to use is Hydrogen Peroxide (H2O2, water with another Oxygen), this molecule usually breaks down on its own accord, but also the rate of decomposition can be increased with the use of a catalyst; in this case the catalyst is a biological one called an enzyme. Hydrogen Peroxide slowly breaks down on its own accord into water (H2O) and oxygen (O2): 2 H2O2 à 2H2O + O2 Hydrogen Peroxide à Water + Oxygen In my experiment, I want to investigate the rate of reaction with an enzyme, and the enzyme I will add to the Hydrogen Peroxide will be Catalase....   [tags: Papers] 2254 words
(6.4 pages)
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The Effect of pH on the Activity of Catalase - The Effect of pH on the Activity of Catalase Planning Experimental Work Secondary Resources Catalase is a type of enzyme found in different types of foods such as potatoes, apples and livers. It speeds up the disintegration of hydrogen peroxide into water because of the molecule of hydrogen peroxide (H2O2) but it remains unchanged at the end of the reaction. This is a type of reaction where a molecule is broken down into smaller pieces. It is called an anabolic reaction....   [tags: Papers] 2256 words
(6.4 pages)
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Investigating the Effect of Concentration on the Rate of Enzyme Catalysed Reaction - Investigating the Effect of Concentration on the Rate of Enzyme Catalysed Reaction To investigate the effect of concentration on the rate of enzyme catalysed reaction I must know all the factors that affect it in order to investigate in this. Here are all the factors: Temperature- Enzyme like it warm but not too hot. Enzymes are biological catalysts, which speed up chemical reactions. They work most efficiently at the optimum point (37°C). If they are below 37°C they will work slower....   [tags: Papers] 2265 words
(6.5 pages)
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Investigating Oxygen Produced From a Reaction - Investigating Oxygen Produced From a Reaction The objective of this coursework is to investigate how the surface area of the potato affects the amount of oxygen produced from the reaction: Hydrogen peroxide [IMAGE] water + oxygen Potato (Catalyst) Catalase Introduction: Enzymes are found in every living organism. An enzyme is a biological catalyst which speeds up a chemical reaction in an organism. Catalase is found in the liver but it is also found in potatoes....   [tags: Papers] 2314 words
(6.6 pages)
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Investigation on the Enzyme Trypsin - Investigation on the Enzyme Trypsin An Investigation determining a factor affecting the rate of digestion of gelatin by the protease trypsin. Introduction An enzyme is a biological catalyst, which speeds up reactions. An example of this in the human body is trypsin (a protease produced in the pancreas and used in the stomach), which catalyses the digestion of gelatine, a protein. For this investigation, a photographic film will be the source of the gelatine. I will be able to identify when the gelatine is digested, when the photographic film turns from a dark brown colour, to being transparent....   [tags: Papers] 2374 words
(6.8 pages)
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The Effect of Different Substrate Concentrations on the Rate of Reaction - The Effect of Different Substrate Concentrations on the Rate of Reaction My aim is to investigate what happens when concentration of Hydrogen Peroxide is changed and how it affects the rate of reaction when it is broken down by the enzyme catalase (H2O2 à 2H2O + O2) Scientific knowledge. Enzymes are biological catalysts, regulating the rate at which chemical reactions take place without the enzyme being altered in the process. Enzymes bind temporarily to one or more of the substrate molecules of the reaction they catalyse....   [tags: Papers] 2376 words
(6.8 pages)
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Investigate the effect of enzyme concentration on the rate of reaction - To investigate the effect of enzyme concentration on the rate of reaction PREDICTION: An enzyme is a biological catalyst. They speed up the rate of a reaction however they do not affected themselves whilst doing this, which is why they are catalysts. Enzymes are made to be specific, this means that they can have only one substrate that they will work on. Each enzyme has an active site that is where their own specific substrate’s molecule will fit into. The enzymes catalyze chemical reactions beginning with the binding of the substrate to the active site on the enzyme....   [tags: GCSE Chemistry Coursework Investigation]
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2404 words
(6.9 pages)
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Quantity of Enzymes and the Rate of Reaction with the Substrate - Is there a relationship between the quantity of enzymes and the rate of reaction with the substrate. Hypothesis Using my scientific knowledge my hypothesis is that as the quantity of enzymes increases so will the rate of reaction. Reasons for this hypothesis I am basing my hypothesis on a hypothesis known as the ‘lock and key hypothesis.’ It explains that when an enzyme substrate complex forms by means of a spontaneous reaction the substrate fits into the active site like a key fits a lock. It is known as a spontaneous reaction not because it happens spontaneously but because it requires initial energy in order for the reaction to take place and the products have less energy than the reactants....   [tags: essays research papers] 2466 words
(7 pages)
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Comparing Free to Immobilised Amylase Enzyme in Its Catalysis Rate - Comparing Free to Immobilised Amylase Enzyme in Its Catalysis Rate Method: First of all, the Immobilised enzymes need to be made. The method used to create these immobilised enzymes would be Micro encapsulation. This means that the enzyme used, in this experiment being Amylase, is encapsulated inside Sodium alginate. The enzyme was believed to act quickly, so the enzyme would have to be slightly diluted in order to get a good range of results. !0cm³ of Amylase will be added to 20cm³ of Sodium alginate, and then mixed....   [tags: Papers] 2467 words
(7 pages)
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Effect of different size beads on the activity of immobilised catalyse - Effect of different size beads on the activity of immobilised catalyse Aim: To find out how varying the size of beads containing yeast varies the rate of activity of catalase in a fermentation reaction of hydrogen peroxide with immobilised enzymes. A catalyst is a substance that speeds up the rate of a chemical reaction, without itself being used up in the process however it maybe affected physically i.e. degradation of the surface of the catalyst. Catalysts work by reducing the activation energy needed for a particular reaction by offering a different path for the reaction to take place....   [tags: Papers] 2468 words
(7.1 pages)
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The Rate of Hydrolysis of Sucrose - The Rate of Hydrolysis of Sucrose Hypothesis - The digestion of sucrose into glucose and fructose is carried out by the presence of the enzyme Sucrase. The activity of the enzyme will be greatest at its optimum temperature since at this temperature the enzyme's tertiary structure will be correct to allow the formation of the substrate-enzyme complex quickly and efficiently. This should be at 37°C (body temperature), which is the temperature of the ileum where Sucrase is secreted and naturally functions....   [tags: Biology Science Experiments Essays] 2531 words
(7.2 pages)
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The Concentration of Hydrogen Peroxide and Speed of The Rate at Which It is Broken Down by Catalase - The Concentration of Hydrogen Peroxide and Speed of The Rate at Which It is Broken Down by Catalase AIM To find out whether the concentration of Hydrogen Peroxide affects the rate of decomposition of hydrogen peroxide when broken down by catalase. SCIENTIFIC KNOWLEDGE Hydrogen peroxide is a liquid bi-product of many chemical reactions in living things. It is toxic, so has to be broken down by the enzyme catalase which is also found in most living things. E.g. [IMAGE]Hydrogen peroxide catalase water + oxygen 2H2O2 (aq) 2H2 O + O2 [IMAGE] The enzyme catalase (peroxidase) was the first enzyme discovered and is one of the fastest enzymes, its turnover rate is about 40,000 molecules/second....   [tags: Papers] 2648 words
(7.6 pages)
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Investigating Factors that Affect the Rate of Catalase Action - Investigating Factors that Affect the Rate of Catalase Action Investigation into the factors which affect the rate of catalase action. Planning Aim: To investigate the affect of concentration of the enzyme catalase on the decomposition reaction of hydrogen peroxide. The enzyme: Catalase is an enzyme found within the cells of many different plants and animals. In this case, it is found in celery. This enzyme speeds up the break down of hydrogen peroxide into water and oxygen, as enzymes are biological catalysts....   [tags: Papers] 2665 words
(7.6 pages)
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Investigation into the Digestion of Milk by Trypsin - Investigation into the Digestion of Milk by Trypsin Background Knowledge ==================== To investigate the effect of trypsin on milk a number of separate experiments will be performed whereby milk is digested by trypsin under controlled conditions. Specific variables will be changed by calculated amounts to gauge their individual effects on the rate and amount of reaction that occurs. Trypsin is a biological catalyst, (a substance that speed up a reaction without being used up or changing the reaction in any way), known as an enzyme that is found in the human body....   [tags: Papers] 2745 words
(7.8 pages)
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Issues of the Human Genome Project - Issues of the Human Genome Project The history of the human race has been filled with curiosity and discovery about our abilities and limitations. As an egotistical creature with a seemingly unstoppable desire for new accomplishments, we attempt feats with emotion and tenacity. People worldwide raced to be the first to discover the secrets and the ability of flight. Enormous amounts of monies were spent on sending people into space and the race to land on the moon. With the rapid growth of scientific knowledge and experimental methods, humans have begun to unravel and challenge another mystery, the discovery of the entire genetic make-up of the human body....   [tags: Genetics Genes Science Papers]
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2775 words
(7.9 pages)
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Analysis of the Enzyme Sucrase for Optimum Temperature, pH, and Concentration - Analysis of the Enzyme Sucrase for Optimum Temperature, pH, and Concentration ABSTRACT Enzymes react differently under different conditions and concentrations, being the most productive at the enzymes specific optimum condition and concentration. The enzyme sucrase, extracted from yeast, breaks down the complex sugar sucrose into the simple sugar glucose. Testing for sucrase’s optimum environment, multiple reactions were ran using varying amounts and concentrations of sucrose and sucrase at different pHs and temperatures....   [tags: Biology]
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2819 words
(8.1 pages)
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The Effects of Temperature on the Rate of Clotting Milk and Rennet - The Effects of Temperature on the Rate of Clotting Milk and Rennet Introduction ------------ The following experiment investigates the effects of different temperatures on a mixture of rennet and whole milk. On having the choice between testing the mixtures reactions at various temperatures, or testing the mixture with various amounts of concentration of rennet, my partner and I decided upon the first option. We made this decision as we felt it would be valuable to our scientific knowledge if we had a better understanding of how different temperatures can effect the behaviour of an enzyme, such as Rennin, which is also known as Chymosin....   [tags: Papers] 2841 words
(8.1 pages)
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Immobilized Enzymes (Yeast) - Immobilized Enzymes (Yeast) Abstract Catalase is an enzyme found in living cells and is used to break down peroxides. Yeast cells, which contain catalase, are used to catalyse the decomposition of hydrogen peroxide solution into water and oxygen gas. The yeast cells were immobilized in sodium alginate beads in this experiment. Immobilized enzymes are widely used in biotechnology processes. They can be reused and is more stable at extremes of temperature and pH, thus improves the economy of the process....   [tags: Papers] 2880 words
(8.2 pages)
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The Effect of Substrate Concentration on the Rate of Activity of the Enzyme Catalase - The Effect of Substrate Concentration on the Rate of Activity of the Enzyme Catalase Background Information: Enzymes are biological catalysts that increase the speed of chemical reactions without undergoing any physical change. They are neither used up in the reaction nor do they appear as reaction products. All enzyme catalysed reactions are reversible. Enzymes effectively lower the amount of activation energy required for chemical reactions to start. Some enzymes weaken covalent bonds within the substrate molecule, whereas in other cases this lowering of the activation energy seems to take place because the enzyme holds the substrate molecules in a particular position that increases the likelihood that the molecules are going to react....   [tags: Papers] 3145 words
(9 pages)
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Investigating the Effect of Copper Sulphate on Amylase Activity - Investigating the Effect of Copper Sulphate on Amylase Activity Aim The aim of my experiment is to observe the affect on amylase when adding copper sulphate to a starch solution. Introduction Enzymes are that act as catalysts, in other words they increase the rate of chemical reactions. Consider the following general reaction between two substances, A and B, which react together to form a product, substance C: A + B = C In biological systems, this reaction might occur very slowly, or not at all, in the absence of an enzyme....   [tags: Papers] 3341 words
(9.5 pages)
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Indigestion Tablets Investigation - Indigestion Tablets Investigation Aim: My aim of this investigation is to find out the composition of tablets which are for indigestion and compare their prices. I will find out the indigestion tablet which reacts and dissolves quickly with Hydrochloric Acid and produces more bubbles. Introduction: Indigestion, also known as upset stomach or dyspepsia, is discomfort or a burning feeling in the upper abdomen, often accompanied by nausea, abdominal bloating, belching, and sometimes vomiting....   [tags: Papers] 3440 words
(9.8 pages)
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Following the Progress of an Enzyme Controlled Reaction - Following the Progress of an Enzyme Controlled Reaction Plan ---- Enzymes are a widely used source of biological catalyst; they are used in widely in industry as in the biological aspects. Enzymes are biological catalyst; this means that they will speed up a reaction with out becoming used up. The enzymes for this by not actually interfering with the reaction its self but basically align the two substrates on the active site of the enzyme. Amylases are widely spread enzymes that hydrolyse starch to maltose....   [tags: Papers] 3587 words
(10.2 pages)
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Exploring the Properties and Functions of Enzymes - Exploring the Properties and Functions of Enzymes Introduction In this experiment I will attempt to investigate how the change in temperature effects the catalyse reaction and what the optimum temperature is. Key factors Key factor (variable) Reason for controlling How it is going to be controlled Temperature of hydrogen peroxide H202 I am going to control this variable because if the temperature of the hydrogen peroxide was higher or lower then the right temperature the test wouldn’t be fair and my results could be affected because a different temperature would result in a different froth height....   [tags: Papers] 3628 words
(10.4 pages)
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Intoxication Will Slow Down Your Reaction Time - Intoxication Will Slow Down Your Reaction Time The experiment tests how long it takes the brain to translate visual information (falling ruler) into your voluntary (or conscious) motor commands and actions (grasping finger movements) that lead to the ruler being caught. The shorter the time, the faster your reactions. That’s if you were paying attention in the first place. Indeed practice specifically affects the ‘associative centers’ in the brain, so that you can respond faster to what’s happening in your visual world....   [tags: Papers] 3691 words
(10.5 pages)
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Investigating the Effect of Temperature on the Fermentation of Yeast - Investigating the Effect of Temperature on the Fermentation of Yeast To fully investigate the effect of temperature on the rate of fermentation of yeast Background Information Yeast is a single-cell fungus, occurring in the soil and on plants, commonly used in the baking and alcohol industries. Every living thing requires energy to survive and through respiration, glucose is converted into energy. There are two types of respiration available to living cells are: 1....   [tags: Papers] 3692 words
(10.5 pages)
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How Hydrogen Peroxide Affects the Rate of Reaction of the Enzyme Catalase - How Hydrogen Peroxide Affects the Rate of Reaction of the Enzyme Catalase Introduction: Catalase, like all enzymes, is made up of protein molecules. It can be found in the cytoplasm of living tissue. It speeds up the decomposition of Hydrogen Peroxide, a metabolic waste product, into water and oxygen that can safely be removed from the cell. The type of reaction involved is known as a catabolic reaction (i.e. substrate broken down.)This is simply because the substrate enters the active site and is broken down, and leaves as 2 separate products, in this case water and oxygen: 2H2O2> 2H20 + O2 [IMAGE] Like all enzymes, the rate at which the enzyme works is affected by many variables....   [tags: Papers] 3805 words
(10.9 pages)
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Catalase Investigation - Catalase Investigation Introduction This investigation aims to determine the effect that varying the pH of the conditions in which a reaction between an enzyme and a substrate takes place. In particular the reaction of hydrogen peroxide being broken down into water and oxygen by an enzyme, catalase. 2H2O2 à2H2O + O2 This reaction would normally occur naturally, but in the presence of the enzyme catalase the reaction occurs much more rapidly and vigorously. Enzymes An enzyme is a biological catalyst....   [tags: Papers] 3933 words
(11.2 pages)
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The effect of catalase concentration on the breakdown rate of h2o2 - The effect of catalase concentration on the breakdown rate of h2o2 The effect of catalase concentrations on the rate of Break down of hydrogen peroxide Scientific knowledge and understanding: A rate is a measure of change that occurs in a given time whilst a reaction is the interaction of substances undergoing chemical change. The velocity at which any mix of substances are transformed into a product/s in a given unit of time is the rate of reaction. The speed at which this modification occurs relies on two main factors; the amount of collisions between reacting particles and what portion of these collisions are successful in producing a change within the substances present....   [tags: GCSE Chemistry Coursework Investigation] 3970 words
(11.3 pages)
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Investigating Enzyme Activity - Investigating Enzyme Activity Aim: To investigate how the concentration of hydrogen peroxide effects the rate of reaction of an enzyme (catalase) Variables: These factors could effect the rate of reaction on an enzyme: · pH · Concentration · Temperature · Surface Area pH - Enzymes function at different pH values. In neutral conditions the amount of oxygen gas given of in an enzyme-catalysed reaction will increase. An enzyme is affected by how much acid or alkali is present....   [tags: Papers] 3981 words
(11.4 pages)
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Enzymes - Enzymes Enzymes are catalysts. Most are proteins. (A few ribonucleoprotein enzymes have been discovered and, for some of these, the catalytic activity is in the RNA part rather than the protein part. Link to discussion of these ribozymes.) Enzymes bind temporarily to one or more of the reactants of the reaction they catalyze. In doing so, they lower the amount of activation energy needed and thus speed up the reaction....   [tags: Papers] 4006 words
(11.4 pages)
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The Ethics of Genetically Modified Food Production - The Ethics of Genetically Modified Food Production As human technological innovation proceeds into the twenty-first century, society is faced with many complex issues. Genetic engineering and cloning, encryption and information security, and advanced weapons technologies are all prominent examples of technological issues that have substantial moral and ethical implications. Genetic engineering in particular is currently a very volatile subject. One important aspect of this field is GMO or Genetically Modified Organisms, which has far-reaching potential to revolutionize modern agriculture....   [tags: GMOs Genetically Modified Foods] 4155 words
(11.9 pages)
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Investigating the Effect of Enzyme Concentration on the Hydrolysis of Starch with Amylase - Investigating the Effect of Enzyme Concentration on the Hydrolysis of Starch with Amylase Aim: Investigate the effect of enzyme concentration on the rate of an enzyme-controlled reaction. Using amylase and starch as my example. Introduction: I am investigating the effect of the concentration of the enzyme, amylase on the time taken for the enzyme to fully breakdown the substrate, starch to a sugar solution. The varied variable will be the concentration and all other variables are going to be fixed....   [tags: Papers] 4181 words
(11.9 pages)
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Preparation of Ethanol and Ethanoic Acid - Preparation of Ethanol and Ethanoic Acid AIM: To obtain pure samples of Ethanol (CH3CH2OH) and Ethanoic Acid (CH3COOH) from fermented Yeast (Saccharomyces Cerevisiae). BACKGROUND INFORMATION: The use of yeast in food production is the oldest and most extensive contribution made by any group of microorganisms. A most common substrate that yeast can work with is GLUCOSE. Glucose is a monosaccharide, which are sweet crystalline sugars that dissolve easily in water to form sweet solutions....   [tags: Papers] 4639 words
(13.3 pages)
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The Effect on the Rate of Respiration of Yeast Cells with Glucose when the Temperature is Varied - The Effect on the Rate of Respiration of Yeast Cells with Glucose when the Temperature is Varied Aim The aim of the experiment is to investigate the effect of temperature on the rate of respiration of yeast cells with glucose. As yeast cells use up glucose in respiration, carbon dioxide gas is given off. Measurements of the volume of carbon dioxide gas given off within a set amount of time can be used to measure the rate of reaction. A fast rate of reaction would be indicated by a large volume of carbon dioxide gas being collected within this set amount of time....   [tags: Papers] 4673 words
(13.4 pages)
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Investigating the Effect of Substrate Concentration on Catalase Reaction - Investigating the Effect of Substrate Concentration on Catalase Reaction Planning -Aim: The aim of the experiment is to examine how the concentration of the substrate (Hydrogen Peroxide, H2O2) affects the rate of reaction of the enzyme (Catalase). -Background information: Enzyme Enzymes are protein molecules that act as the biological catalysts. A catalyst is a molecule which can speed up chemical reaction but remains unchanged at the end of the reaction. Enzymes catalyze most of the metabolic reactions which take place within a living organism....   [tags: Papers] 4867 words
(13.9 pages)
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Your search returned 200 essays for "enzymes":
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