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.
The role of substrate specificity in the mechanism of enzyme action.
Enzymes: Note the enzyme has the ending ase as in sucrase and the actual substrate is sucrose.
Effects of competitive inhibition on enzyme kinetics
Effects of uncompetitive inhibition on enzyme kinetics
Pathway for conversion of glucose monomers to polymeric glycogen
Conversion of F+ to an Hfr state occurs by integration of the F factor