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Essays in Molecules & Cells category
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To find out how temperature affects the rate of anaerobic respiration by yeast
... solution-glucose concentration ____) * Temperature - as I am testing this variable I will need to vary it but I will have to keep it constant throughout each individual test. I will do this by placing a thermometer in the water ...
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To find out how the rate of reaction of yeast can be increased
... called zymase. A chemical reaction always involves one substance being changed into another. The substance that is present at the beginning of the reaction is called the substrate. The substrate that is made by the reaction is called the product. ...
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To find out if temperature affects the amount of juice the enzyme pectinase releases from an apple.
... and the substrate products are released separately. Because the substrate molecules are different shapes they will only fit into certain enzymes. When the enzyme reaches a temperature too high it will change shape, therefore the substrate molecule would not fit. ...
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To find out if temperature affects the amount of juice the enzyme pectinase releases from an apple.
... and the substrate products are released separately. Because the substrate molecules are different shapes they will only fit into certain enzymes. When the enzyme reaches a temperature too high it will change shape, therefore the substrate molecule would not fit. ...
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To find out if temperature directly affects the activity of protease enzyme
... of 20oc (I will repeat this process for the further temperatures (listed in results table)). When I was sure that my evidence would be valid I placed each test tube into the beaker, making sure that each film strip was ...
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To find out if the strength of a solution affects the amount of water passing into and out of cells in potato.
... the cell, this decreases the pressure of the vacuole on the cytoplasm until the cytoplasm comes away from the cell wall. This makes the cell limp and is known as Plasmolysed. The following diagram further explains this theory: Also if the ...
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To find out the effect of increasing the concentration of hydrogen peroxide on the rate of catalytic reaction using catalyse.
... substance will not work on a different one. The substance on which an enzyme acts is called its substrate. The diagram below shows how the shape of an enzyme could decide what substrate it combines with. The enzyme has a ...
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To find out the optimum temperature for the enzyme trypsin.
... of marvel/milk in my experiment. I will put both of the liquids into two different test tubes and them put them into a beaker. I will fill the beaker with water and then heat the trypsin and the milk up. ...
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To find out what a change in concentration of concentration of enzymes does to the length of time it takes to make the substrate into the product. I will use starch as the substrate, and amylase as the enzyme.
... highest. I also predict that the graph at the end will be a straight line of concentration on the x-axis and time on the y-axis. I think that the concentration of enzymes will be directly proportionate to the time taken, ...
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To find out what factors affect the rate of reaction between rennin and milk.
... RNA. Enzymes have catalytic properties; in other words, they alter the rate of reaction without themselves undergoing a permanent change. Most chemical reactions require an initial input of energy, called activation energy, to enable them to occur. Enzymes reduce the ...
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To find the effect of temperature on enzymes, using a potato as a catalyst
... are large proteins that speed up chemical reactions. In their globular structure, one or more polypeptide chains twist and fold, bringing together a small number of amino acids to form the active site, or the location on the enzyme where ...
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To find the effect of the enzyme concentration on the reaction between Catalase and hydrogen peroxide.
... be made up of different configurations of polypeptide chains. There are secondary, tertiary and quaternary structures (i.e. haemoglobin) protein molecules which increase respectively in complexity. Proteins contain an 'R-group' which is specific to each amino acid, this part of the ...
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To find the optimum temperature that the enzyme catalyse works at.
... temperatures. I will then have to have a reaction that can be controlled to measure the efficiency and speed of the reaction. Catalase reacts violently with hydrogen peroxide, therefore to get a reaction I shall put the liver containing catalase ...
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To Investigate (By Experimentaion) the Effect of Substrate Concentrations On the Rate of the Decomposition of Hydrogen Peroxide When Catalyzed By the Enzyme Catalase.
... of the fastest acting enzymes known. It catalyses the decomposition of hydrogen peroxide, liberating oxygen gas as effervescence, each molecule of the globular protein decomposing 40,000 molecules of hydrogen peroxide per second at zero degrees Celsius and capable of producing ...
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To investigate a certain factor that will affect the rate of breakdown of the protein gelatine using trypsin.
... a black protean gelatine coating and trypsin breaks down proteins so therefore will break down the coating and the film will just become a clear strip of plastic. Trypsin usually works at pH8 or pH9 (alkali conditions) and at human ...
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To Investigate an Enzymes Reaction.
... each time. I will use six different concentrations of the substrate and go down in the amount of percentage used. E.g. 100% - H2O2, 80% - H2O2 + 20% - H2O, 60% - H2O2 + 40% - H2O etc. I will see what ...
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To investigate and compare the activity of immobilised enzymes against enzymes free in solution at a range of different concentrations.
... The human body temperature is 37C, and without catalysts the reactions would be too slow to sustain life. Since there are thousands of different reactions happening in cells, and each requires a specific enzyme, enzymes must be made of ...
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To investigate changes in the rate of reaction under different temperatures using yeast.
... they are used in biological detergents and washing powders. They break down foods, blood and other biological substances. These biological detergents are more effected than ordinary because they contain enzymes as well as soaps and detergents. The enzymes for these ...
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To investigate factors that affects the rate of breakdown of the protein gelatine by trypsin.
... Cylinder Controlled. Amount of Gelatine. cm. Ruler Prediction: I am going to change the temperature that the trypsin works at. The time taken for the trypsin to digest the gelatine will change because of this. I predict that the temperature that the trypsin works at ...
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To investigate how different factors affect the rate of breakdown of sucrose by the enzyme sucrase.
... investiagtion I will use the enzyme sucrase to catalyse the substrate sucrose into glucose and fructose molecules. Affecting Factors There are several factors which affect the efficiency of enzymes. These are temperature, pH values and concentration of the enzyme and substrate. pH Value There ...
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To investigate how temperature affects the concentration of vitamin C in orange juice (specifically 'Just Juice').
... has turned a purply-brown colour). I predict that when I plot a graph of temperature against volume of DCPIP used, I will get a straight-line, indicating direct correlation between the two. Method: In order that we obtained the most accurate ...
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To investigate how temperature affects the enzyme amylase.
... will be denatured and will no longer work. Only few cells can accept temperatures high than approximately 45c. Enzymes work by having an active site substrate molecules, which will join with the enzyme and a reaction will take place. The ...
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To Investigate how temperature affects the rate at which catalase catalyses hydrogen peroxide.
... the thermometer until the right temperature has been reached 5) Keep the temperature steady for 2 minutes by removing the heat (if it drops dramatically, heat again) to allow the test tubes to remain at a constant heat 6) Take out the ...
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To investigate how temperature affects the rate at which the enzyme Catalase breaks down hydrogen peroxide into oxygen and water
... my hypothesis. First of all I will use the 'lock and key' theory. All enzymes are specific and there is one enzyme per function. The enzyme that I am investigating is called Catalase and its function is that it can only break ...
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To investigate how temperature affects the rate of reaction of the enzyme catalase on its substrate hydrogen peroxide
... the enzyme it is specified to. This can be explained as a lock and key hypothesis, where the lock and key are specific to each other, only, that there are many of the same kinds of lock and key when ...