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Catalase and reaction rate
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Megan Roe 12OMT Aim: To investigate the effect of pH of hydrogen peroxide solution on enzyme activity of the catalase enzyme (yeast) and the O2 froth produced (ml) after 1 minute. Hypothesis: That an increase of hydrochloric acid to a solution where yeast cells are exposed will increase the rate amount of enzyme catalase (O2 froth) produced, as from my research it has been proven that with some enzymes the optimum pH is around 2 (stomach enzymes). Variables: Independent Variable: pH The independent variable being used in this experiment is pH, and the effect it has on enzyme activity. The range of pH I am using is 5 different pH levels (2,4,7,9,12), this range covers all of the important pH levels that I need for this experiment, including …show more content…
This can be checked by using a thermometer with each substance. Method: Tape a ruler to a wall at eye level. Make sure all substances being used ar at room temperature (37℃) with a thermometre Measure out 1 ml of the Hydrogen Peroxide (H2O2) solution with a plastic pipette, then transfer to a clean boiling tube. Repeat this another two times into two other boiling tubes. Add to each three boiling tubes 1 ml of the pH buffer solution being used first (hydrochloric acid or sodium hydroxide) with the pipette for, and pour into a boiling tube with the Hydrogen Peroxide solution. Use a pipelette to gather some of the mixture out of the three boiling tubes and place one drop from each boiling tube into three separate tile spotters. Use one drop of universal indicator on each solution in the tiles spotters to determine the correct pH that is needed for the first reaction (either 2,4,7,9,12). Add to each three boling tubes 1 ml of yeast, and start a timer as soon as the yeast is transferred to the boiling tubes. Time each boiling tube for 1 minute, then measure the O2 froth produced from the solution with a ruler at eye level. Repeat above steps 5 times for each pH level
We then took 1ml of the 0.1% solution from test tube 2 using the glucose pipette and added it to test tube 3, we then used the H2O pipette and added 9ml of H2O into test tube 3 creating 10ml of 0.01% solution.
The purpose of this study is to analyze the activity of the enzyme, catalase, through our understanding
values by using buffers set at PH 1, 3, 5, 7, 9. I predict that there
I will use a set of five pH's to get my readings from the collected
pipette (1 ml) of a specific sugar and adding one mL of yeast to the sugar, mixing them together in a test tube with the letter that corresponds to the sugar according to the procedure. Collecting water at a temperature of thirty seven degrees celsius into a 250 ml beaker is the next step. Once the test tube and the 250 ml beaker is filled with the correct substances, the yeast and sugar in the test tube should be placed into the beaker and left for a ten minute incubation period. While waiting for the incubation period the LabQuest is calibrated according to the procedure provided. After the ten minute incubation period, the testing of carbon dioxide production will begin with collecting the mixture of yeast and sugar into a new, clean,
10. Removed after 10 minutes from the 40oC water bath. Record the color intensity (0-5) of each test tubes in “Color Intensity 10 min” column of table 1. Observations: The contain of each test tube has different pH buffer.
After sixty seconds, the Barium sulphate powder will have developed a colour which can be compared to the colour chart to determine a pH scale
* I will fill water in the trough. * By using the measuring cylinder, I will measure 100cm3 of the hydrogen peroxide solution. Then I pour the solution inside the conical flask.
Introduction Have you ever seen the bread rising when it is put in the oven? Yeast is the ingredient that is causing the bread to rise. Then how does this work? What is happening to the yeast when it is put in the oven? Yeast is the single celled organism that belongs to the Fungus Kingdom.
This is very important as changing the volume can have a negative effect on your experiment and report. Make sure that you use 10cm3 of hydrochloric acid throughout all the 5 trials, You can measure the volume with help of a measuring cylinder or you can also use a pipette to measure it accurately
Effect of temperature on the enzyme and the amount of foam produced Introduction The enzyme used in this investigation was catalase, catalase is a type of protein called enzyme and the function of an enzyme is to catalyse(speed up) biochemical reaction. Catalysts such as enzymes are important in biochemical reaction, without them the reaction would occur too slow for an organism to survive. Catalase is present in most organisms which are in contact with oxygen, as it protects the organism from damage due to peroxide formed in the body from several metabolic processes. Catalase acts by speeds up the decomposition reaction of hydrogen peroxide to water.
From looking at the results I can conclude that when the pH was 3 and
observation could be that oxygen is produced when hydrogen peroxide is broken down by the enzyme catalase. A large piece of potato will contain a higher amount of catalase than a smaller piece and therefore produces a greater volume of oxygen. The Task Design an experiment to show an increase in the concentration of catalase affects the volume of oxygen released from hydrogen peroxide. Hypothesis I predict that as you add more potato, the concentration of the catalase increases resulting in an increase in the volume of oxygen. released from hydrogen peroxide.
I decided to experiment with pHs within the range pH 2 to pH7, as I
* To get the pH more accurate next time, a pH meter could be used. * To get it very accurate, the acids and alkalis supplied should be an exact amount (I am not sure whether the ones I used