Question

describe the first reaction in glycolysis. Is this reaction catalyzed by an enzyme

Answer 1

Glucose is converted to Glucose 6 phosphate by the action of the enzyme Hexokinase

Answer 2

Glycolysis is a series of reactions that extract energy from glucose by splitting it into two three-carbon molecules called pyruvates. Glycolysis is an ancient metabolic pathway, meaning that it evolved long ago, and it is found in the great majority of organisms alive today^{2,3}2,3.

In organisms that perform cellular respiration, glycolysis is the first stage of this process. However, glycolysis doesn’t require oxygen, and many anaerobic organisms—organisms that do not use oxygen—also have this pathway.

Each reaction in glycolysis is catalyzed by its own enzyme. The most important enzyme for regulation of glycolysis is phosphofructokinase, which catalyzes formation of the unstable, two-phosphate sugar molecule, fructose-1,6-bisphosphate^44. Phosphofructokinase speeds up or slows down glycolysis in response to the energy needs of the cell.


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