The first product of glycolysis is:

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(C) Glycolysis is the first stage of cellular respiration,occurring in the cytoplasm of the cell.In the first step of glycolysis,a molecule of glucose

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Glucose-$6$-Phosphate

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(C) Glycolysis is the first stage of cellular respiration,occurring in the cytoplasm of the cell.In the first step of glycolysis,a molecule of glucose is phosphorylated by the enzyme hexokinase (or glucokinase) in the presence of $ATP$ and $Mg^{2+}$ ions.This reaction converts glucose into glucose-$6$-phosphate.Therefore,glucose-$6$-phosphate is the first stable product formed in the glycolytic pathway.

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