If glucose is the sole energy source, what fraction of the carbon dioxide exhaled by animals is generated only by the reactions involved in oxidation of pyruvate to acetyl coa?

We have to know what fraction of the carbon dioxide exhaled by animals is generated only by the reactions involved in oxidation of pyruvate to acetyl coa.

The fraction is: 1 CO₂ per puruvate molecule.

Pyruvate oxidation takes place in the mitochondrial matrix, before chemical reactions begins, pyruvate enters the mitochondrion crossing the inner membrane and arriving at the matrix.

Oxidation of pyruvate results acetyl coenzyme A after release of one molecule of CO₂.

the answer is c.the valence of the atoms combine .