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Title - Enzyme reactions and temperature. Purpose Aim - To determine the effect of temperature on the rate of reaction of rennin when it reacts with milk to cause coagulation. Hypothesis - As rennin is naturally found in the human stomach I believe that the optimal temperature for reaction will be approximately 37°C as this is the regular human body temperature. This is shown by the graph below. 1 Background Research Rennin is "an enzyme that catalyses the coagulation of milk, found in the gastric juice of the fourth stomach of young ruminants and used in making cheeses and junkets. Also called chymosin, rennet."2 It is also found in the gastric juices, or Gastric mucosa, of many other mammals, including humans. In the human stomach, particularly those of infants, rennin works to curdle milk so that pepsin, another stomach enzyme, can further breakdown the proteins into absorbable amino acids called polypeptides Several experiments have...

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