What are the three irreversible steps of glycolysis and how do they contribute to the overall process of glucose metabolism?

The three irreversible steps of glycolysis are catalyzed by enzymes hexokinase, phosphofructokinase, and pyruvate kinase. These steps help regulate the flow of glucose through the glycolytic pathway by committing glucose to further metabolism. Hexokinase phosphorylates glucose, trapping it inside the cell. Phosphofructokinase controls the rate of glycolysis by regulating the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate. Pyruvate kinase catalyzes the final step, producing pyruvate and ATP. These irreversible steps ensure that glucose is efficiently broken down to produce energy in the form of ATP.