In what stage of aerobic respiration is carbon dioxide produced?
Correct answer: C. Krebs cycle.
- A. Glycolysis.
- B. ETC.
- C. Krebs cycle.
- D. Calvin cycle.
Explanation
Krebs cycle (or citric acid cycle) breaks down the pyruvic acid to carbon dioxide. This produces 2 ATP and 6 NADH for every glucose molecule entering glycolysis. The Krebs cycle takes place in the matrix of the mitochondria. The Krebs cycle produces the CO2 that you breathe out.Glycolysis is the initial stage of glucose metabolism that occurs in the cytoplasm of the cell, and does not produce carbon dioxide.ETC (Electron Transport Chain) is the final stage of aerobic respiration that occurs in the mitochondria, and does not directly produce carbon dioxide.Calvin cycle is a series of biochemical reactions that occur in the chloroplasts of plants during photosynthesis, and is not directly related to the production of carbon dioxide in aerobic respiration
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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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