Question

Under typical cellular conditions, which enzyme does not catalyze an irreversible reaction in glycolysis?

Answer 1

Phosphoglycerate kinase does not catalyze an irreversible process in glycolysis under normal cellular circumstances.

Discussion about glycolysis:

• Ten stages make up the glycolysis process, seven of which are reversible and three of which are practically irreversible. These are the first, third, and final stages that are successively catalyzed by hexokinase, phosphofructokinase, and pyruvate kinase.

• During the glycolysis process, glucose 6-phosphate is changed into pyruvate. Everything that happens is cytoplasmic. Fructose 6-phosphate is created by reversible isomerization of glucose 6-phosphate. Physiologically irreversible fructose 6-phosphate phosphorylation to fructose 1,6-bisphosphate is performed by phosphofructokinase.

Hexokinase, phosphofructokinase-1, and pyruvate kinase conduct nearly irreversible events during glycolysis, hence one would anticipate that these enzymes have both regulatory and catalytic functions.

So, option d i.e., phosphoglycerate kinase should be the appropriate response.

Learn more about glycolysis here:

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