The enzyme pyruvate kinase catalyzes the conversion of phosphoenolpyruvate to pyruvate; the phosphate group is transferred to ADP to form ATP. This reaction is an example of:

Answer: ATP synthesis by substrate level phosphorylation

Explanation:

The dephosphorylation if phosphoenol pyruvate (PEP) to pyruvate by pyruvate kinase is an example of substrate level phosphorylation where one molecule of ATP is generated during this reaction.

Pyruvate kinase catalyzes the transfer of a phosphate group from PEP to ADP, which produces one molecule of pyruvate and one molecule of ATP. This step is irreversible.

This reaction is an ATP synthesis by substrate-level phosphorylation

Oxidative Phosphorylation in glycolysis.

Explanation:

Kinases are the enzymes which cause transfer of the phosphate group from one molecule to another molecule. As the PEP is converted to pyruvate in glycolysis by a pyruvate kinase enzyme it causes phosphorylation. It is one of the important regulatory steps of glycolysis.