Most CO₂ from catabolism is released during
A) glycolysis.
B) the citric acid cycle.
C) lactate fermentation.
D) electron transport.

Question

Quizplus · Accepted Answer

Carbon dioxide is released as a byproduct during the citric acid cycle (also known as the Krebs cycle or TCA cycle). This occurs in the mitochondrial matrix during the final stages of cellular respiration, which involves the breakdown of glucose into ATP. While some CO₂ is also produced during the initial stages of glycolysis, the majority is released during the citric acid cycle. Lactate fermentation does not produce carbon dioxide, and while CO₂ is involved in electron transport, it is a relatively small amount compared to that generated in the citric acid cycle.

Most CO₂ from Catabolism Is Released During