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Find out how changing the temperature will affect the overall C02 production.

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Introduction

Year 10 GCSE biology coursework In my investigation I aim to find out how changing the temperature will affect the overall outcome in the experiment in terms of C02 production. Co2 is produced as a bi-product of yeast respiration and I hope to get a clear set of results to prove my prediction correct and draw up a graph to make my results clearer in a different format to a table. The theory behind the experiment is that the higher the temperature goes the faster the reaction will go, I chose to test temperature to see if where the point was where the enzymes stopped working properly due to the temperature being to intense for them ending up in them being destroyed and so slowing the experiment again I will no when this happens because the co2 production will decrease. ...read more.

Middle

take down the time and temperature to help when doing a graph and for finding out the effect the temperature actually had on the speed of the experiment. You should repeat this over equal intervals of time. I predict that for my experiment the amount of co2 produced will increase as the temperature does this is because of the collision theory, this being that the higher the temperature the more molecules have energy to move around the beaker, and the more they move around and the faster they do it the more collisions will take place ending up in more reactions taking place, but once the temperature reaches a certain point the amount of co2 produced will slow down because the enzymes will denature meaning the substrate will no longer fit the enzyme. ...read more.

Conclusion

number of collisions in the time period we were testing and as a result of this more reactions took place, the reasoning behind the slowing of the reaction after forty degrees is that the enzymes did de-nature and the substrate did no longer fit and so slowing the reaction. I feel that my results are highly reliable as the test conditions were perfect due to the programme used on the computer, I was happy with my method as doing on the computer made testing only one variable at any one time very easy. I think that my results are accurate enough to back up my conclusion although I could repeat the test more times to get an even more accurate average but I feel that 3 times is sufficient enough for my conclusion to be backed up with. ...read more.

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