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proenzyme

n.
1.any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active

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  • Idiom of the Day

    make (someone) tick
    to motivate someone to behave or act in a certain way
    It is difficult to know what makes our boss tick.



    1.
    Her face turned as red as a ________.

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