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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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:

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9 Test tubes,

3 Beakers,

Thermometer,

Pipette,

Stopclock,

Test Tube rack,

2cm3 of Milk,

Rennin,

Ice.

This investigation will be kept fair by using appropriate variables. The variable I am going to change is the temperature of the water. I will be keeping the amount of rennin and the amount of milk constant. The only variable that could cause a problem is the water temperature. Some of the results will need to be repeated for the lower temperatures because when they heat up past their desired temperature it is harder for it to cool down because room temperature, for example ...

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