Carbon dioxide is NOT released during
Correct answer: C. glycolysis
- A. the link reaction
- B. the Krebs cycle
- C. glycolysis
- D. alcoholic fermentation
Explanation
Glycolysis only rearranges and splits the six carbons of glucose into two three carbon pyruvate molecules, so no carbon is lost as gas. Decarboxylation begins with the link reaction, which removes one carbon per pyruvate, and continues twice more in each turn of the Krebs cycle. Alcoholic fermentation also releases carbon dioxide when pyruvate is converted to ethanal.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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