Draw the molecular structures of citrate, isocitrate, α-ketoglutarate, and succinyl-coa in a pathway sequence. show which carbons came from acetyl-coa and which go off as co2.

In the oxidation of Pyruvate to Acetyl CoA  one carbon atom is released as CO2, However, the oxidation of the remaining two carbon atoms in acetate to CO2, requires a complex, eight step pathway, the citric-acid cycle.

Explanation:

Overall, one turn of the citric acid cycle releases two carbon dioxide molecules and produces three {NADH} one {FADH2} and one ATP or GTP. The Citric acid cycle goes around twice for each molecule of glucose that enters cellular respiration because there are two pyruvate and thus, two acetyl {CoA}s are made per glucose.