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# Investigate the effect of temperature on the action of rennin and milk.

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Introduction

Investigate the effect of temperature on the action of rennin and milk Rennin is an enzyme produced in the stomach of young mammals. It speeds up the reaction that makes milk proteins go solid. I am going to find out what is the best temperature that rennin works at I think that the rennin will work best at a temperature of 40 I think this will happen because most enzymes work best at a temperature of 37 (body temperature ) but the rate of reaction doubles if the temperature is 10 higher so the enzyme works best at 47 and I have rounded this down to 40 this is because the temperature 47 would be to hard to get on the thermometer and also if I would round this up to o50 the enzyme would stop working because it would become denatured this is because rennin is a protein. ...read more.

Middle

I will measure the water the rennin and the milk so they are all at about 20. I will put the rennin and the milk in two test tubes and then the put these test tubes in a beaker of water the water will be at a temperature of 20 when the rennin and the milk reach the same temperature then I will mix the m together in on test tube and I will also start the stop watch once the e mixture has gone solid then I will do the experiment once more I will do the same experiment but each time I will change the temperature I will use these temperatures 20,30,40,50,60 I will do each of these experiments twice A fair test To make it a fair test I will use the same amount of rennin and milk each time. I will also repeat each of these experiments twice. ...read more.

Conclusion

The enzyme was posed to denature at 50 but when I did my experiment it didn't denature so I think that I may have done my experiment wrong. At 30 the enzyme takes along time this is because the enzyme works slower below 37. My results nearly match my prediction in my prediction I said that 40 would be the best temperature and this was right in my prediction I also said that at 50 or over the experiment would not work but mine worked so I think I have done my experiment wrong this my be because the temperature kept dropping below 50 or it could be that it denatures at a higher temperature. Evaluation I think that I have succeeded in doing my experiment. I found that it hard to keep the temperature at the right level if I put some hot water in the temperature would go too high but then if I put some ice in it would go too low this is why I think that my experiment may be wrong ...read more.

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# Related AS and A Level Molecules & Cells essays

1. ## The effect of Temperature on Enzyme Action (Rennin)

The students then placed the 3 test tubes in water bath and left it for 5 minutes. 5. Following on they poured the contents of test tube C (rennin solution) into test tube A and start the stopwatch. 6.

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This will reduce the number of collisions between the rennin and the caseinogen, and there is a higher probability that these collisions will be unsuccessful due to the lack of energy. Therefore the rate of reaction will reduce. At 0�C I still suspect the rennin to catalyse the conversion of caseinogen to paracasein, but it will take a lot longer.

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