Acetyl-CoA Labeled with ¹⁴C in Both of Its Acetate Carbon

question 85

Multiple Choice

Acetyl-CoA labeled with ¹⁴C in both of its acetate carbon atoms is incubated with unlabeled oxaloacetate and a crude tissue preparation capable of carrying out the reactions of the citric acid cycle. After one turn of the cycle, oxaloacetate would have ¹⁴C in:

• A) all four carbon atoms.
• B) no pattern that is predictable from the information provided.
• C) none of its carbon atoms.
• D) the keto carbon and one of the carboxyl carbons.
• E) the two carboxyl carbons.

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