In which stage of aerobic respiration, 2-carbon molecules are oxidized completely to carbon dioxide?
Correct answer: B. Krebs cycle
- A. Glycolysis
- B. Krebs cycle
- C. ETC
- D. Calvin cycle
Explanation
The Krebs cycle, also known as the citric acid cycle or tricarboxylic acid (TCA) cycle, is a central pathway in cellular respiration that takes place in the mitochondria of eukaryotic cells. It is a series of chemical reactions that ultimately leads to the complete oxidation of acetyl-CoA, derived from the breakdown of carbohydrates, fats, and proteins, producing carbon dioxide, energy-rich molecules, and reducing equivalents.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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