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Hans Krebs, a German biochemist, was awarded a Nobel Prize in 1953 for the discover o an important cycle. What does his cycle represent?

A. The last stage of photosynthesis
B. The first stage of aerobic respiration
C. The process of carbon dioxide fixation
D. The flow of hydrogen ions through the mitochondria.

User Wikier
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Answer: B) the first stage of aerobic respiration

Step-by-step explanation:

User Hudson Pereira
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