Question

"The biochemical pathway of aerobic respiration involves a number of different steps. Name one step in which carbon dioxide is produced. (1)"

a) Glycolysis
b) Citric acid cycle (Krebs cycle)
c) Electron transport chain
d) None of the above

Answer 1

In the biochemical pathway of aerobic respiration, carbon dioxide is produced in the Krebs cycle, also known as the citric acid cycle.

Step-by-step explanation:

One step in which carbon dioxide is produced in the biochemical pathway of aerobic respiration is the Krebs cycle, also known as the citric acid cycle. During the Krebs cycle, acetyl CoA combines with oxaloacetate to form citrate, a six-carbon molecule. In a series of chemical reactions, carbon dioxide is released, ultimately generating four CO₂ molecules in total for each glucose molecule that is completely oxidized. This step occurs in the mitochondria and requires oxygen.