Question

multiple choice question
how do adp and atp interact with the enzyme phosphofructokinase?
phosphofructokinase is activated by low levels of either atp or adp.
high levels of adp inhibit phosphofructokinase, while high levels of atp activate it.
phosphofructokinase is inhibited by high levels of either atp or adp.
high levels of atp inhibit phosphofructokinase, while high levels of adp activate it.

Explanation:

Phosphofructokinase is a key enzyme in glycolysis. High - levels of ATP indicate abundant energy, so it inhibits phosphofructokinase to slow down glycolysis. High levels of ADP indicate low energy status, so it activates phosphofructokinase to speed up glycolysis.

Answer:

High levels of ATP inhibit phosphofructokinase, while high levels of ADP activate it.