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Investigation to Study how Temperature Affects The Activity of an Enzyme Introduction: Substrate Concentration When the concentration of substrate is low collisions between the enzyme and substrate molecules are infrequent and reaction proceeds slowly. As the substrate concentration increases, the rate of reaction increases proportionately as there are more collisions between the two reactants. When the enzymes begin to approach the maximum rate at which they can combine with reactants and release products, the effects of increasing substrate concentration lessen. When enzymes reach the point where they are reacting as quickly as possible an increase in substrate concentration will have no effect. At this point the enzyme is saturated and the reaction remains at the saturation level. Bearing in mind the above information I predict that as the level of catalase is increased (i.e. the volume of potato) the rate of reaction will increase up to the enzymes saturation point, which can only...

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