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Factors affecting enzyme activity
Added Sep 12, 2013
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when enzyme and substrate molecules they randomly Collide forming enzyme substrate complex it as temperature increases so does the kinetic energy of the molecules and their full set the rights which these collisions occur that comes a point at which the maximum rate of reaction it's achieved and the temperature at which this occurs is known as the old temperature if the temperature continues to increase the on the optimum the enzymes begin to lose a three-dimensional structure becomes denatured therefore reducing the rate action now you need to be able to recognize the growth of the effect of temperature on enzyme to looks like this with the peak being the optimum temperature to explain up to the peak as the temperature increases so does the kinetic energy of the enzymes and the substrates resulting in an increased frequency of collision between the two does increasing the right reaction but beyond the ultimate temperature this continuing increase in kinetic energy results in a loss of 3D structure from the change it. now for a look at pH increasing pH values are as a result of adding hydroxide ions oh decreasing pH is as a result of adding hydrogen ions H+ either of these can potentially alter the charges on the amino acids that make up the and this can lead to the enzyme's active site changing shape because the bonding changes for example and that contain Nitric or it could mean that the substrate how long can find to the enzyme's active science I either way the right of reaction is reduced the effect of pH on enzyme activity is Samuelson of temperature older you might notice almost ametco decreasing rate of reaction either side of the optimum pH also having a look at substrate concentration when we change substrate concentration we are assuming the enzyme concentration is remaining constant initially increasing substrate concentration from zero will increase the rate of reaction as a substrates randomly collide with the enzymes in the enzymes catalyze the reaction however the enzyme's active size of field and the enzymes already working as quickly as they can to catalyze the reaction this is where the maximum rate of reaction is reached and any further addition of substrate the oldest will not increase the rate of reaction
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Phuong Nguyen
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