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Essays in Molecules & Cells category
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The Uses of Enzymes In Industry, Medicine and Analytical and Diagnostic Processes.
... added which break down substances in the food which the species body cannot digest. Many foodstuffs for farm animals such as wheat, rye, barley and oats contain non-starch polysaccharides (NSPs) which are an example of ANFs (anti-nutritional factors). They cannot ...
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The ways in which organisms use ATP
... the cell needs to exist. ATP is also used as an on-off switch both to control chemical reactions and to send messages. The shape of the protein chains that produce the building blocks and other structures used in life is mostly ...
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Theeffects of amylase concentration on the breakdown of starch
... an active site. Active sites are areas on an enzymes surface that are specially designed to bond with the substrate molecules, to allow the substrate to be acted upon, in this case starch. In order for this reaction to occur ...
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There are 2 basic cell types.
... the site of the synthesis of many substances in the cell and so provides a compartmentalised area in which this takes place. The cavities also function as a transporting system whereby substances can move through them from one part of ...
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There are five major groups of compounds that compose the human body. They are carbohydrates, lipids, proteins, nucleotides, and water. These are all very important to humans and without them we would not be able to survive
... cells, sugars are the most important source of energy. Lipids are important because they function as structural components of cell membranes, sources of insulation, and a mean of energy storage. The lipid molecules are most well known as forming ...
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There are four main families of receptors: ligand-gated ion channels, G-protein coupled receptors, kinase-linked receptors and nuclear receptors.
... shape enabling it to fit into a receptor site, causing a pharmalogical response. Drugs can be categorised into two groups by analysing their effect on the receptor when acting on specific receptors. The first of the two groups being agonist ...
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This coursework observes the reaction between starch and amylase and looks, how when adapted, the input variable effects the rate of reaction.
... particles of amylase to collide with the starch, which are there to break the starch down faster. Preliminary work Before conducting my actual experiment I ran a preliminary test to base my prediction upon. This was basically to check that my measurements ...
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This experiment aims to determine the effect an increasing temperature has on a typical plant cell structure.
... is now accepted as the basis of our understanding of cell membranes: It is understood as an asymmetrical mosaic of lipids and proteins. The membrane shows fluid behaviour because of movements and packing variations among its lipids and proteins. The lipid ...
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This experiment aims to determine what effect an increase in the surrounding temperature has on the plasma membrane of a typical plant cell structure.
... them to grow, produce energy, and eliminate waste. Together these reactions are termed metabolism (from a Greek word meaning, "change"). All cells contain hereditary information, encoded in molecules of deoxyribonucleic acid (DNA), that directs the cell's activities and enables it ...
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This experiment is to find out how different temperatures affect the rate at how an enzymes activity differs , using catalase and hydrogen peroxide.
... is found in any living cells. The temperature, UV light, movement and surface area are factors which would affect the way it works. Aim: The aim of this experiment is to find out how temperature affects hoe an enzyme works. ...
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This experiment was setup to investigate the effects of temperature on the rate of respiration of blowfly larvae
... is the name for any molecule upon which an enzyme has an effect.) Enzymes sometimes become denatured. This is when a certain factor affects the bonds holding the amino acids together, and they start to break, eventually resulting in the ...
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This is an experiment to examine how the concentration of the substrate Hydrogen Peroxide (H2O2) affects the rate of reaction of the enzyme Catalase.
... will no longer go up. This is because the maximum number of reactions are being done at once so any extra substrate molecules have to wait until some of the active sites become available. Predicted Graph BACKGROUND INFORMATION: A catalyst is a ...
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This is an experiment to show how different concentration of celery tissue enzyme, catalase breakdown the bonds of hydrogen peroxide, substrate, to produce oxygen given out at different rate of reactions.
... of the super oxide ion in living organisms. Enzymes are specific. Contrary to inorganic catalysts such as acids, bases, metals and metal oxides, enzymes are very specific. In other words, each enzyme can break down or synthesize one particular compound. In ...
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This is an investigation to determine the effect of concentration on the activity of an enzyme Trypsin on the insoluble protein found in milk known as Casein.
... Enzyme and Substrate Temperature The rate of an enzyme controlled reaction is measured upon the substrate used or the products formed over a period time. Increasing the temperature causes more heat energy, which makes the substrate molecules and enzymes move a lot ...
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This piece of coursework is about the enzyme catalase. Enzymes are used all over the body for different jobs such as the breaking down of food. I did an experiment to find out at what temperature did the most activity happen.
... a fair test or not. If so, how did I make it a fair test? How did I ensure that all the equipment was suitable to give each set of results an equal chance?> What safety procedures did I ...
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To carry out an investigation into the denaturing of immobilised lactase enzymes in relation to thermodynamics.
... sweetener, and can be found in small amounts in infant and dietary foods and coffee whiteners. Lactose is very inexpensive due to its existence in great amounts. The splitting of lactose can be brought about with the use of the enzyme, ...
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To determine if the rate of reaction of free enzymes is higher that the rate of reaction in immobilised enzymes in different pH concentrations of solution.
... optimum level, then the enzyme will denature. If the temperature is too high, the bonds of the 3D shape will break, and thus the enzyme will denature. Every enzyme has an optimum pH, (the pH at which the enzyme will ...
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To determine the effect of Detergent on the Permeability of Cell Membranes.
... is to act as transport proteins, which are hydrophilic channels, which only allow certain ions or molecule through, with each channel being specific to a certain one. The cell membrane is said to be partially permeable and acts as a ...
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To determine the optimum pH for two different proteolytic enzymes.
... most active. The optimum pH of each enzyme is represented by the crest of the graph of enzymatic reaction against pH of buffer solution. Buffer solution is a solution which resists the change in its pH value by adding acid, ...
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To examine the effect of temperature on the enzyme catalase.
... that other molecules fit into the active site. This is known as either competitive or non competitive inhibition * What is Catalase specifically Catalase is an enzyme found in most creatures. It converts naturally produced hydrogen peroxide into water ...
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To find out how different concentrations of sucrose solution affect the incipient plasmolysis of different root vegetables until the isotonic point has been reached.
... Pure water contains the highest water potential which is zero kilopascals 0(?) All solutions have a lower water potential then pure water hence there water potentials are always negative, the more solute molecules present the lower more negative the water ...
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To find out how enzyme concentration affects the rate of an enzyme controlled reaction
... glucose molecules. Aim To find out how enzyme concentration affects the rate of an enzyme controlled reaction Hypothesis I believe that the effect of increasing the concentration of the enzyme will increase the speed with which the enzyme-controlled reaction takes place. This prediction is correct ...
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To find out how is enzymes affect by different type of temperature and see the changes in the colour of the mixture of iodine, starch and amylase.
... and will therefore not react so quickly. Eventually the shape of the amylase molecule changes too much and the starch molecule will not be able to fit on at all. This means that the amylase will not be able to ...
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To find out how temperature affects amylase.
... will supply the molecules with more energy to react, and then it will slow down and the rate of reaction will be a lot longer. Apparatus: * Bunsen burner * Tripod * Gauze * Beaker * 2 test tubes * 2 spotting tiles * ...
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To find out how temperature affects the breakdown of starch by the enzyme amylase.
... insure that the water is the same temperature through out each experiment and that the temperature is accurate. If my water is too cold I can add hot water and if it is too hot I can add cold water. ...