Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate, an early step of glycolysis. In the presence of oxygen, an increase in the amount of ATP in a cell would be expected to
A) inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle.
B) activate the enzyme and thus slow the rates of glycolysis and the citric acid cycle.
C) inhibit the enzyme and thus increase the rates of glycolysis and the citric acid cycle.
D) activate the enzyme and increase the rates of glycolysis and the citric acid cycle.
E) inhibit the enzyme and thus increase the rate of glycolysis and the concentration of citrate.
Conversion of pyruvate to acetyl CoA, the junction between glycolysis and the citric acid cycle.
Reaction coordinate diagram comparing enzyme-catalyzed and uncatalyzed reactions
Conversion of succinate to fumarate
Temperature conversion
The catabolic conversion of the disaccharide lactose into its monosaccharide
Enzyme activity varies with temperature