Phosphofructokinase is an important control enzyme. All of the following statements concerning this enzyme are true except:

A) It is activated by citrate.

B) It is inhibited by ATP

C) It is activated by ADP.

D) It is a coordinator of the processes of glycolysis and the Krebs cycle.

E) It is an allosteric enzyme.

Question

Biology

Waylon Howard

28 October, 07:50

Phosphofructokinase is an important control enzyme. All of the following statements concerning this enzyme are true except:

A) It is activated by citrate.

B) It is inhibited by ATP

C) It is activated by ADP.

D) It is a coordinator of the processes of glycolysis and the Krebs cycle.

E) It is an allosteric enzyme.

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Answers (1)

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Malik Rollins · Answer 1

D) It is a coordinator of the processes of glycolysis and the Krebs cycle.

Explanation:

Phosphofrutokinase is a very important enzyme in glycolysis, as it acts as a regulating factor of the glycolytic process that catalyzes a phosphorylation: the conversion of fructose 6-phosphate and ATP into fructose 1,6-bisphosphate and ADP. This is an allosteric enzyme, which is activated by citrate and ADP, but is inhibited by the presence of ATP that endorses the enzyme that its work is not needed at the moment. Although very important in glycolysis, this enzyme is not part of the krebs cycle.