<prompt> The enzyme phospho fructokinase 1 is strongly activated by:Cyclic ampAdenosine triphosphateCitrateFructose 2,6 bisphosphate  <response>: Ans. D. Fructose 2,6 bisphosphatePFK is the most important regulatory enzyme in glycolysis. PFK is an allosteric enzyme regulated by allosteric effectors. ATP, citrate and H ions are the most important allosteric inhibitors. 