During the energy investment phase of glycolysis, two molecules of ATP are utilized per molecule of glucose. Which of the following pairs represents the direct products formed by these two ATP-consuming reactions?

Step-by-step solution

In glycolysis, ATP is utilized at two specific steps. The first ATP is consumed when glucose is phosphorylated to form glucose-6-phosphate. The second ATP is consumed when fructose-6-phosphate is phosphorylated to form fructose-1,6-bisphosphate. Therefore, the direct products of these two ATP-consuming reactions are glucose-6-phosphate and fructose-1,6-bisphosphate. Fructose-6-phosphate is a substrate, not a product, of the second ATP-consuming step. 3-phosphoglyceric acid and pyruvic acid are products of ATP-gener