Why is it necessary for ATP to be used in the energy-investment phase of glycolysis?
A) Adding the phosphate to the glucose molecule allows the later reactions that take place in the energy payoff phase to occur.
B) Adding the phosphate to the glucose molecule breaks it into pyruvate.
C) There is no purpose to adding the phosphate to the glucose; it just happens that way.
D) When ATP is broken into adenosine, triglycerides, and phosphate, it supplies energy to produce more ATP later in oxidative phosphorylation.
E) The energy released when ATP becomes ADP is harnessed and used to pump hydrogen ions across the mitochondrial membrane.

Question

Quizplus · Accepted Answer

Adding the phosphate to the glucose molecule in the energy-investment phase of glycolysis allows for the later reactions in the energy payoff phase to occur. This initial investment of ATP is necessary to ultimately produce a net gain of ATP through the process of glycolysis.

Why Is It Necessary for ATP to Be Used in the Energy-Investment