Question

In what stage of cellular respiration is most of the carbon dioxide produced? A. glycolysis B. fermentation C. citric-acid cycle D. electron transport chain

Answer 1

Answer;

C. citric-acid cycle

Explanation;

-Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate.

-The citric acid cycle is a series of reactions that produces two carbon dioxide molecules, one GTP/ATP, and reduced forms of NADH and FADH2. Because two acetyl-CoA molecules are produced from each glucose molecule, two cycles are required per glucose molecule. Therefore, at the end of two cycles, the products are: two GTP, six NADH, two QH2, and four CO2.

Answer 2

The correct answer is c), the citric-acid cycle produces the the most carbon dioxide within the cellar respiration.