Glycolysis Transitional Reasoning Practice

Questions

1. 1.

   In an experiment investigating carbohydrate metabolism, a researcher provides a cell-free cytosolic extract with glucose, an initial pool of ATP, ADP, and inorganic phosphate, but omits NAD+. The researcher observes that glucose is converted to fructose 1,6-bisphosphate and cleaved into triose phosphates, but ATP production and pyruvate accumulation fail to occur. Which change would directly allow the payoff phase of glycolysis to proceed and yield net ATP?

   • A) Introducing molecular oxygen to directly oxidize triose intermediates non-enzymatically
   • B) Supplying excess ADP to drive the initial phosphorylation of glucose
   • C) Adding oxidized coenzyme NAD+ to permit the oxidation of glyceraldehyde 3-phosphate
   • D) Supplying additional ATP to accelerate the cleavage of fructose 1,6-bisphosphate

Answers and step-by-step solutions appear after you finish the test.