Question

Which of the following enzymes are involved in coupled reactions in glycolysis? (Select all that apply.) Phosphoglycerate kinase Fructose-bisphosphate aldolase Enolase Hexokinase

Answer 1

Hexokinase, Phosphofructokinase, Phosphoglycerate kinase and Pyruvate kinase

Step-by-step explanation:

Coupled reactions are reactions that require energy by one process and is supplied by another; where the energy is transferred from one side of the reaction to the other.

In glycolysis, four (4) reactions undergo coupled reactions

1. Reaction one: which is the phosphorylation of glucose to glucose-6-phosphate coupled to the hydrolysis of ATP to ADP and Pi catalyzed by hexokinase.

2. Reaction three: The phosphorylation of fructose-6-phosphate to fructose-1-6-bisphosphate and the hydrolysis of ATP, catalyzed by phosphofructokinase

3. Reaction seven: Phosphoglycerate kinase catalyzes the conversion of Bisphoglycerate to 3-phoshoglycerate and the production of ATP from ADP

4. Reaction ten: Pyruvate kinase catalyzes the conversion of enol phosphate to the enolic form of pyruvate with the synthesis of ATP.