Final answer:
In step 7 of glycolysis, ATP is produced through substrate-level phosphorylation.
Step-by-step explanation:
In glycolysis, ATP is produced through several steps, including step 7. In this step, 1,3-bisphosphoglycerate is converted into 3-phosphoglycerate. The conversion is coupled with the transfer of a phosphate group from 1,3-bisphosphoglycerate to ADP, forming ATP. This process is known as substrate-level phosphorylation.