Carbon dioxide molecule-cycle of Krebs cycle

Question

How many carbon dioxide molecules are released subsequent to each cycle of Krebs cycle? For single glucose how many carbon dioxide molecules were already released through the aerobic respiration at that point?

Answer 1

Each and every round of Krebs cycle releases 2 carbon dioxide molecules. At the end of cycle each carbon atoms from original glucose molecule degraded (broken) in the glycolysis are already released incorporated in carbon dioxide molecules. That takes place because each glucose two pyruvic acid molecules were made up by glycolysis.
Each of such 2 pyruvic acids then is twenty seven.