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I am investigating the enzyme rennin, to see at which temperature it will clot the milk the quickest. Rennin is found in your stomach. It clots the milk that you drink so that it stays in your body longer.

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Introduction

Carly Swannell 10C2 ERG Investigating Rennin. Planning I am investigating the enzyme rennin, to see at which temperature it will clot the milk the quickest. Rennin is found in your stomach. It clots the milk that you drink so that it stays in your body longer. This is an advantage as the longer the milk stays in your body, the more protein can be extracted. I expect to find that the water temperature closest to 73oC, which is your body temperature, will clot quicker. This is because rennin clots in the body at body temperature. Therefore the warmer the water, the quicker it will clot. Equipment The equiment I am going to use is: 9 Test tubes, 3 Beakers, Thermometer, Pipette, Stopclock, Test Tube rack, 2cm3 of Milk, Rennin, Ice. ...read more.

Middle

It is harder to keep constant temperature at a lower heat. Observing I will use the thermometer to find when the temperature of the water has settled. I will place the test tubes into the beakers. I will not start the stopclock until the rennin has been placed into all of the test tubes. The test tubes will be checked at 90-second intervals to see if the milk has been clotted. When clotting has occured, I will record the time into my results table. Diagrams Ice Cold Room temperature Carly Swannell 10C2 ERG Boiling About Enzymes Enzymes are proteins. They are very important substances because they control the chemical reactions that happen in our bodies. ...read more.

Conclusion

If the stomach does not have enough acid, its enzyme will not work properly. About Rennin Rennin is an enzyme obtained from a young animal's (usually a calf's) stomach. It's used to curdle milk in foods such as cheese. Its role in digestion is to curdle or coagulate milk in the stomach, a process of considerable importance in the very young animal. If milk were not coagulated, it would rapidly flow through the stomach and miss the opportunity for initial digestion of its proteins. Results Carly Swannell 10C2 ERG Conclusion The conclusion to my experiment partially matched my prediction. The two test tubes which clotted were those at room temperature (28oC) as this was temperature closest matched to the human body. If I was to do the investigation again, I would make more of an effort to ensure the temperatures were kept constant. This may have affected the actual results. ...read more.

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