What happens to glucose during glycolysis?

During glycolysis, glucose undergoes a series of chemical transformations. First, it is phosphorylated to form glucose-6-phosphate. Then, it is rearranged and further phosphorylated to form fructose-1,6-bisphosphate. The six-carbon sugar is then split into two three-carbon molecules, which are converted into pyruvate. Along the way, energy is captured in the form of ATP and NADH, which are used by the cell.