Subscribe to our Fortnightly Newsletter. Placing potato cylinders in hydrogen peroxide Rate of reaction The height of bubbles formed in 5 trials for each concentration of catalase was added then divided by 5 to yield the average height of bubbles in each concentration. When this saturation point is reached, then adding extra substrate will make no difference. Carry out each reaction three times to gain an average. Catalysts increase the rate of metabolism in living cells without being consumed or altered permanently in a reaction, and therefore they can be used over and over again.

Subscribe to this RSS feed. Investigating catalase and hydrogen peroxide concentration Clean up any spillages immediately. Most enzymes also have an optimum pH at which they function best. Final Volume of Oxygen in cm cubed. In my first preliminary experiment, the reaction went too fast to collect oxygen at a measurable rate.

When I repeated the procedure with 4cm 3 of hydrogen peroxide, I could effectively measure the volume of gas. Recording Results I will record my results in a table like the one below, and then record further, average results, in a similar table. I can find out what these values might be by drawing a line up and across from the line of best fit. As enzyme work best at a certain temperature, this is known as optimum temperature.

Substrate molecules will not often collide with the active site, and so binding between substrate and enzyme is a rare event.

Placed 5 test tubes in each test tube rack. To obtain catalase from a substance such as potato would involve crushing it and with that method you would never be sure of the concentration of the catalase. As a user in the EEA, your approval is needed on a few things.


Enzyme inhibitors are substances that directly or indirectly interfere with the functioning of the active of an enzyme and so reduce its activity. Non-competitive inhibitors will bind to another part of the enzyme rather than the true active site.

Therefore, reaction is slow.

Effect of Substrate Concentration on the Rate of Activity of Catalase | Owlcation

Catalase and Hydrogen Peroxide Experiment Education. This would result in a greater probability of successful collisions, and therefore more enzyme-substrate complexes being produced. This will eliminate a very large apparatus error that would occur if I used a beaker or conical flask. Overall, there is a pattern showing a constant trend in that as the concentration decreases the rate of reaction decreases too, and that the overall volume of gas evolved clursework decreases.

The limitation experienced in the classroom was the method of distribution of hydrogen peroxide. If you contact us after hours, we’ll get back to you in 24 hours or less. So the indepent variable is the yeast and the indepent variable should be the x-axis! Furthermore, the volume of gas is measured hydfogen. Represent the results in a graph in order to work out the gradient and make a conclusion based on the evidence you have obtained.

catalase and hydrogen peroxide experiment coursework

I will investigate if this is true for this reaction. I believe that as the concentration of the hydrogen peroxide substrate decreases, the rate of reaction will decrease as well.

Size Gcse Coursework Biology Potato Catalase Hydrogen Peroxide

How about receiving a customized one? This results in a bigger proportion of molecules having a kinetic energy greater than that of the activation energy. In other works, it is flexible and moulds itself around the substrate. By Alford Ico Ico. I will also use the peroxixe batch of yeast because this will ensure that the yeast granules have the same surface area.


Average final volumes of oxygen for each concentration of hydrogen peroxide. The plotted results on the graph produce a straight line of best fit to begin with which then goes into a curve of steadily decreasing gradient.

Effect of Substrate Concentration on the Rate of Activity of Catalase

Evaluation The rate of decomposition of hydrogen peroxide is tested and observed with increasing concentration of catalase from potato exeriment. This is used to prevent bots and spam. Enzyme works in the same way as a key operates catalasw lock. Catalase can convert this I will work out the rate of reaction from the results gained in the first 5 seconds as this will be the point where the greatest volume of gas evolves.

catalase and hydrogen peroxide experiment coursework

Increasing the Hydrogen Peroxide Concentration after the point of saturation has been reached will not cause the rate of reaction to go up any more. Catalase and Exam; Catalase and Exam I will talk about why this might have been in my evaluation.