Mature human red blood cells obtain all of their ATP from
Correct answer: B. glycolysis alone
- A. the Krebs cycle
- B. glycolysis alone
- C. oxidative phosphorylation
- D. the electron transport chain
Explanation
Red blood cells have no mitochondria, so they can only run glycolysis and produce lactate. Any answer involving the Krebs cycle or electron transport chain needs mitochondria, which mature erythrocytes throw away before entering the blood.
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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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