Biology Enzyme Experiement - 2263 Words

An enzyme is a biological catalyst. It speeds up a reaction by lowering the activation energy required to start the reaction. It speeds up a reaction, but remains unchanged unless certain limiting factors are introduced. It is composed of polymers of amino acids. An enzyme has an optimum pH and temperature. When an enzyme is at its optimum conditions, the rate of reaction is the fastest. In their globular structure, one or more polypeptide chains twist and fold, bringing together a small number of amino acids to form the active site, or the location on the enzyme where the substrate binds and the reaction takes place. An enzyme has an active site, which has a unique shape into which only a substrate of the exact same unique shape can fit.†¦show more content†¦My hypothesis is that the more acidic the milk is the faster it takes for the milk to curdle when renin is added to it. As pH increases, enzyme activity increases until it reaches an optimal point in which enzymes dena tures and as pH increases, enzyme activity decreases. Trends in this experiment don’t make proper sense due to inaccurate measurements of the temperature of the milk and inaccurate measurement of pH level. Though I can say that at pH level 7 and 11 the time taken for the milk to curdle were really low and close, at pH level 8 the time taken was high and at pH level 9 no result was taken maybe because the enzyme doesn’t function the at this particular pH level. In conclusion my hypothesis was correct, the more acidic the milk the faster the time it takes for the milk to curdle. Due to inaccurate measurement, correct results might not have been obtained thus impacted on our results. VARIABLES Independent variable – the pH level of the substrate Dependant variable – The time it takes for the milk to curdle Controlled variable - The size of the test tube, amount of milk poured into each test tube, amount of renin mixed inside test tube, same weather condition, same temperature of the milk inside the test tube. METHOD - Get half a tablet of renin and put it insideShow MoreRelatedInvestigating The Rate Of Enzyme Activity Within A Experiment Essay1179 Words   |  5 PagesThe purpose of this report is to determine which catalyst effect the rate of enzyme activity within a experiment. Enzymes lower the energy of activation by binding with substrate in chemical reactions to allow the reaction to occur. energy activation is the reguired amount of energy required amount of energy needed to start a chemical reaction. This decreases the faster the enzyme reaction goes by the shape change on an active site. the conclusion is that the enviromental conditions such as pH, temperatureRead MoreThe Effect Of Temperature On The Rate Of Enzyme1839 Words   |  8 PagesObjective: Biology 160 Lab 5 Part A: Scientific Methodology Enzyme Activity 4/28/15 The purpose of this experiement is to determine the effect of temperature on the rate of enzyme reaction, specifically testing the reaction rates at 0, 23, 37, and 55 degrees Celcius. Introduction: 1. According to the book Campbell Biology, an enzyme is a biological catalyst that reduces the activation energy in a reaction, allowing the chemical reaction to take place at a faster rate. A substrate binds to theRead MoreThe Rate Of Movement Of The Porcellio Scaber Moved Slower At Lower Temperatures Essay1862 Words   |  8 Pageschanged when it was placed in different temperatures and therefore if the temperature affected their ecological niche. My graph is slightly different compared to the Rosehill College’s practical investigation of porcellio scabers graph, found under the biology section on the Rosehill College webpage. The Rosehill College porcellio scaber graph from 5 °C to 15 °C decreased in average rate of movement and from 15 °C to 25 °C, it increased in average rate of movement. My graph did not decrease at any point as