Animals exhale carbon dioxide that was primarily produced in
A)glycolysis.
B)the electron transport system.
C)lactate fermentation.
D)the Krebs cycle.

Question

Quizplus · Accepted Answer

Carbon dioxide is produced as a byproduct of the Krebs cycle (also known as the citric acid cycle or TCA cycle) during cellular respiration. Animals exhale this carbon dioxide during the process of respiration. Glycolysis and lactate fermentation do not produce carbon dioxide as a byproduct, and while the electron transport system also contributes to the production of carbon dioxide, it is primarily produced during the Krebs cycle.

Animals Exhale Carbon Dioxide That Was Primarily Produced in