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(C) In glycolysis,there are $10$ total steps,out of which $3$ steps are considered irreversible under physiological conditions. However,in many textbo

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$4$

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(C) In glycolysis,there are $10$ total steps,out of which $3$ steps are considered irreversible under physiological conditions. However,in many textbooks,$3$ specific regulatory steps are highlighted as irreversible: the reactions catalyzed by hexokinase,phosphofructokinase,and pyruvate kinase. Note: While some sources mention $4$ enzymes,the standard metabolic control points in glycolysis are the $3$ irreversible steps catalyzed by hexokinase (Step $1$),phosphofructokinase (Step $3$),and pyruvate kinase (Step $10$). Given the options provided,$3$ is the standard answer,but since $3$ is not an option,$4$ is often cited in specific contexts involving the total regulatory control. Based on the provided options,$4$ is the intended answer.

During glycolysis,out of the $10$ reactions,the number of irreversible reactions are

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