posted by jeff .
Which of the following substances serves as an intermediate through which all cellular energy sources are interconvertible?
Interconvertible, like fructose to glucose to glycogen to fat back to glucose? What does pyruvate do?
Look at biochem testbook. "Acetal CoA is a cental character in the cellular metabolism... [through which] all the energy sources (fats, proteins, and carbohydrates) are interconvertible".
Acetyl CoA is the correct answer.
Acetyl CoA is the answer according to the book, pg 741.