Which of the following is produced during Kreb's cycle?

Which of the following is the connecting link between glycolysis and Krebs cycle?

How many $ATP$ molecules are produced by substrate-level phosphorylation during the complete oxidation of one molecule of pyruvic acid?

Identify the location of the chemical cycle shown below.

Which enzyme is associated with the oxidative phosphorylation process in the $Kreb's$ cycle?

In one turn of the citric acid cycle,how many substrate-level phosphorylation reactions occur?