Question

8 multiple choice 1 point each round of the citric - acid cycle begins when the four - carbon molecule oxaloacetate is converted to the six - carbon molecule citrate. as the cycle progresses, two carbons are eliminated to regenerate the oxaloacetate. the added carbon is supplied by _ and the two eliminated carbons are released as _. co₂; nadh co₂; acetyl - coa atp; acetyl - coa acetyl - coa; co₂ co₂; pyruvate 9 multiple choice 1 point why is pyruvate oxidation an important stage in cellular respiration? because it links glycolysis with the citric acid cycle. because it eliminates toxic pyruvate from the cell. because it transfers large numbers of electrons to electron carriers. because it generates atp by substrate - level phosphorylation. because it is the first step in oxidative phosphorylation.

Explanation:

In the citric - acid cycle, the added carbon is supplied by acetyl - CoA and the eliminated carbons are released as CO₂. Pyruvate oxidation links glycolysis with the citric - acid cycle. Glycolysis produces pyruvate, and pyruvate oxidation converts pyruvate into acetyl - CoA which enters the citric - acid cycle.

Answer:

1. acetyl - CoA; CO₂ (corresponding to the option acetyl - CoA, CO₂)
2. Because it links glycolysis with the citric acid cycle.