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Glycolysis begins with which of the following reactions?

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Glycolysis begins with which of the following reactions?

(a) reduction

(b) oxidation

(c) phosphorylation

(d) acidification

The question was posed to me during an online interview.

Origin of the question is Metabolism topic in division Bioenergetics, Enzymes, Metabolism, Genes, Chromosomes and Genomes of Cell Biology

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Correct answer is (c) phosphorylation

Explanation: Glycolysis begins with the addition of a sugar molecule to a phosphate group. Phosphorylation activates the sugar molecule to take part in later steps of the process and also reduce the concentration of glucose in the cytoplasm, promoting continued diffusion from blood to the cell.

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