Enzyme

FACTORS AFFECTING ENZYME ACTIVITY PURDUE UNIVERSITY INSTRUMENT VAN PROJECT Factors bear on Enzyme Activity INTRODUCTION The chemical chemical chemical receptions occurring in living things are controlled by enzymes. An enzyme is a protein in the jail cell which lowers the activation energy of a catalyzed reaction, thus increase the rank of the reaction. The enzyme which you will investigate in this exercise is peroxidase. Peroxidase catalyzes the reaction: 2 H2O2? 2H2 O + O2 The reaction serves to convert toxic hydrogen hydrogen peroxide (H2O2), a product of metabolism, into water and oxygen. This reaction occurs spontaneously, but slowly, in the absence of peroxidase. Peroxidase simply serves to accelerate the reaction. Peroxidase is substantially extracted from turnips by homogenization in pilot film. The broken cells release peroxidase (as easy as some other enzymes) into the buffer. The enzyme can then be degage from the cellular rubble by filtration or centrifu gation. In set to test for the battlefront of the enzyme, the extract is mixed with H2 O + O2and a compound usually known as Guaiacol (2-methyoxyphenol). If the enzyme is present, the peroxide is right away born-again to water and oxygen, and the oxygen reacts with the Guaiacol to produce a cook product, oxidize Guaiacol. The brown color can be deliberate in a spectrophotometer.

O2 + guaiacol ? brown color The simple assay set out above will only indicate whether peroxidase is present in or absent from an extract. By modifying the basic assay, however, we can fit more about this enzyme and about enzymatic activity in general. In the series of experiments that follow, you will investigate the effects of enzyme concentrat! ion, pH, and temperature on the rate of the peroxidase-catalyzed conversion of H2O2 to water and oxygen. INSTRUCTOR DEMONSTRATION commemorate the catalyzed reaction of H2O2 and O2by peroxidase enzyme. Your instructor will mix the contents of ii test tubes made up of the following contents: underground A 2 mL pH 5 buffer 1...If you penury to get a full essay, order it on our website: OrderEssay.net

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