substrate concentration on the reaction rate of an enzyme IB biology Internal Assessment 3/23/12 Research Question: Effect of changes in substrate concentration amount on the reaction rate of an enzyme Introduction: In this experiment‚ the substrate is hydrogen peroxide. The purpose of this investigation is to find out the relationship between the substrate concentration and the rate of reaction. Substrates are molecules that are acted upon by enzymes. For instance‚ amylase‚ an enzyme found
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structure of the enzyme is mainly dependent on the active site and variable groups. Extreme temperatures or extreme pHs can alter the structure of an enzyme. Enzymes function to lower the activation energy to break the bonds. They achieve this by putting stress and pressure on the bonds or creating a microenvironment for the substrate. Enzymes are regulated by inhibitors or activators and can be inhibited by the products of the reaction‚ called feedback inhibition. Enzymes are catalytic proteins;
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Science Form 3 note SMART STUDY - GOOD LUCK Teacher zaidi@maher2010 Chapter 1: Respiration Respiration Human Breathing Mechanism Transport of oxygen Importance of a healthy respiratory system Respiratory system Diffusion of oxygen by blood Harmful substances lungs Transport of oxygen by blood Effects of pollutants inhalation Diffusion of oxygen into cell Respiratory diseases. Good habit to improve air quality. exhalation Human Respiratory
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temperature on the rate of fermentation in yeast by measuring the height of CO2 produced in a graduated cylinder at varying degrees Celsius. Yeast can perform cellular respiration and fermentation‚ the first needing oxygen (aerobic) and the second not (anaerobic). Cellular respiration is the normal way human bodies’ make energy‚ but when lacking oxygen‚ cells undergo fermentation‚ which creates less energy than respiration‚ CO2‚ and lactic acid (though in yeast‚ ethel alcohol is made instead of lactic
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Mechanics of Respiration Angelica D. Francisco‚ MD‚ MSc Edited to Word Format by: GASES KINETIC THEORY OF GASES o MOLECULES IN CONSTANT MOTION > TEMPERATURE > PRESSURE > VOLUME AVOGADRO’S LAW: V n CHARLES’ LAW: V=kT THE VOLUME OF A GAS IS PROPORTIONAL TO THE TEMPERATURE V = kT‚ P is constant IDEAL GAS EQUATION V = kn‚ T and P are constant EQUAL VOLUMES OF GASES‚ CONTAIN EQUAL NUMBER OF MOLECULES. PV= nRT P‚ PRESSURE V‚ VOLUME OF GAS n‚ NUMBER OF MOLECULES OF GAS R‚ GAS CONSTANT T‚ TEMPERATURE
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Enzyme Inhibition Many drugs exert their action by inhibition of an enzyme activity in the body. If the activity of an enzyme is vital to the cell or organism‚ then inhibition may lead to death of the cell or organism. It is now possible to design new drugs which are enzyme inhibitors once a target enzyme has been identified. Types of Inhibitors A) Reversible Inhibitors: The effect of the inhibitor is instantaneous‚ and it can be removed from the enzyme by dialysis so that the enzyme activity
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Aerobic respiration is the release of energy from glucose or another organic substrate in the presence of Oxygen. Strictly speaking aerobic means in air‚ but it is the Oxygen in the air which is necessary for aerobic respiration. Anaerobic respiration is in the absence of air. Here is a molecular model of a glucose molecule. You do not need to memorise the diagram for you GCSE exam‚ but it should help you to understand that a molecule of glucose contains six atoms of Carbon (shown in blue)‚ twelve
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Production of Yeast in Different Sucrose Solutions Internal Assessment Azayleah Delgado October 27‚ 2013 Period 2 Carbon Dioxide Production of Yeast in Different Sucrose Concentrations Raw Data Tables: Sucrose concentration (%) Volume of CO2 captured (mL) 0 minutes 5 minutes 10 minutes 0 4.5 4.5 5.0 2.5 4.0 4.5 4.5 5 4.0 4.0 4.5 7.5 4.0 4.5 4.5 10 3 3.5 3.5 Table 1: Trail 1 of Volume of CO2 captured by sucrose concentration Sucrose concentration (%) Volume
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Goldfish Respiration Abstract The purpose of this experiment is to design and conduct a basic scientific experiment‚ identify and control variables. Some other objectives that we learned is to write a formal hypothesis‚ identify the basic and integrated process skills of science that were used in this experiment. Also‚ we will learned the effects of temperature on goldfish respiration. This experiment will be conducted with four students ‚ one goldfish‚ thermometer‚ a stop watch‚ and a beaker
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around the plant as needed. The mesophyll cells have chloroplasts and this is where photosynthesis occurs. Respiration can be defined as the oxidation of the end products of glycolysis with the storage of the energy in the form of ATP. Cellular respiration occurs when oxygen is available‚ and the products are carbon dioxide and water. There are three main pathways in the cellular respiration process. These are: pyruvate oxidation‚ the citric acid cycle‚ and the respiratory chain. Pyruvate oxidation
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