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    Question

    Which one of the following is the group of herbicide

    affecting synthesis of amino acids like valine, leucine and isoleucine?
    A Sulfonylureas Correct Answer Incorrect Answer
    B Triazines Correct Answer Incorrect Answer
    C Dinitroaniline Correct Answer Incorrect Answer
    D Thiocarbamates Correct Answer Incorrect Answer

    Solution

    Sulfonylurea herbicides inhibit the enzyme acetolactate synthase (ALS), which is involved in the biosynthesis of branched-chain amino acids such as valine, leucine, and isoleucine. By inhibiting this enzyme, sulfonylurea herbicides disrupt the production of these essential amino acids, leading to the death of susceptible plants.

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