Glycolysis: The First Step in Cellular Respiration

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What is the first step in glycolysis?

  1. Phosphorylation of glucose
  2. Isomerization of glucose-6-phosphate to fructose-6-phosphate
  3. Cleavage of fructose-1,6-bisphosphate into two three-carbon molecules
  4. Formation of pyruvate
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