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QA › Biology › 14CO2 was bubbled through a suspension of liver cells that was undergoing gluconeogenesis from lactate to glucose. Which carbons in the glucose molecule would become radioactive?

14CO2 was bubbled through a suspension of liver cells that was undergoing gluconeogenesis from lactate to glucose. Which carbons in the glucose molecule would become radioactive?

The answer is: none of them.

Explanation: Gluconeogenesis is an enzyme-catalyzed reaction, taking place in the liver. When phosphoenolpyruvate is formated from oxaloacetate, the carbon dioxide gets discharged in this process, and no external CO₂ is needed in order to convert lactate into glucose.

Biology

3 years ago

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