Regulatory enzymes, such as ____, in energy-producing pathways show greater activity at ____ energy charge.
A) fructose-1,6-bisphosphatase; low
B) acetyl-CoA carboxylase; low
C) pyruvate kinase; high
D) PFK-1; low
E) none of the above

Question

Quizplus · Accepted Answer

PFK-1 is a regulatory enzyme in glycolysis pathway which catalyzes a rate-limiting step. It shows greater activity at low energy charge, indicating the need for more energy production. As energy charge increases, the activity of PFK-1 decreases, preventing excess production of ATP.

Regulatory Enzymes, Such as ____, in Energy-Producing Pathways Show Greater