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    Home > What factors affect enzyme activity?

    What factors affect enzyme activity?

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Temperature, substrate concentration and pH value are three factors affecting enzyme activity

    Enzymes are catalysts - substances that improve the reaction rate

    Without it, the necessary process of life, such as digestion, would be greatly slowed down

    Many enzymes have the ideal temperature and pH values to make them work most efficiently with invariance

    Denaturation or inactivation of the enzyme occurs when the protein begins to disintegrate

    Temperature is one of the main factors affecting enzyme activity

    As heat increases, molecules usually move faster and faster, and this increased activity means that molecules are more likely to collide with enzymes

    The higher collision rate makes the reaction increase, but it can only reach a certain high point

    If the temperature increases too much, the enzyme protein will begin to denature, which is a potential permanent process

    The optimal temperature range of many enzymes is 25-40 ℃, but some enzymes, such as animals living in seawater or hot springs, tend to have higher or lower optimal survival temperature

    Temperature is not the only factor affecting enzyme

    If the enzyme concentration is consistent, the increase of the concentration of the enzyme reactants (molecules involved in the reaction) will also affect the reaction speed of the enzyme

    With the increase of the concentration of the reactants, the initial rate of the reaction increases, because more enzymes promote the reaction

    However, after reaching a specific point, the additional enzyme reactants will not affect the enzyme activity, because there are only so many enzymes

    On the contrary, the reaction rate will be consistent, because the additional enzyme reactants need to wait for the enzyme to promote the reaction

    The pH level in the solution also affects the enzyme activity

    Many enzymes are only effective in a narrow pH range

    If the enzyme finds itself in an unsuitable pH range, it will denature

    The optimal pH range of many enzymes is 7-7.5, but not all enzymes are suitable for this condition

    Some enzymes, such as those in the stomach, are most efficient at an acid pH of 1.5, while those in the gut perform best at a slightly alkaline pH of 8.0.
    This article is an English version of an article which is originally in the Chinese language on and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.
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