What is the main function of the Krebs cycle?

A. To produce large numbers of ATP molecules

B. To break glucose down into two pyruvate molecules

C. To provide molecules for the electron transport chain

D. To produce carbon dioxide for use in the thylakoid

The pyruvate molecules produced during glycolysis contain a lot of energy in the bonds between their molecules ... Prior to entering the Krebs Cycle, pyruvate must be converted into acetyl CoA. This is achieved by removing a CO2 molecule from pyruvate and then removing an electron to reduce an NAD + into NADH.