Final answer:
The reaction that consumes ATP is c. Fructose 6-phosphate → Fructose 1,6 bisphosphate, catalyzed by phosphofructokinase during glycolysis.
Step-by-step explanation:
The reaction that consumes ATP among the options provided is c. Fructose 6-phosphate → Fructose 1,6 bisphosphate. This phosphorylation process is catalyzed by the enzyme phosphofructokinase during glycolysis. ATP is used as a substrate to add a phosphate group to fructose 6-phosphate, forming fructose 1,6-bisphosphate and ADP as a result.
The other reactions listed (such as the conversion of succinate to fumarate and malate to oxaloacetate) are part of the Krebs Cycle and do not consume ATP. Instead, these reactions either do not involve ATP or, in the case of the conversion of succinyl-CoA to succinate, actually generate a molecule of GTP, which can be converted to ATP.