You do an experiment in which you use acetyl-coa with 14c label on both carbons of the acetyl group. you let this run through one round of the citric acid cycle with unlabeled oxaloacetate, and monitor the production of 14co2. at which reactions (labeled by the enzyme that catalyzes them) do you expect to detect 4co2?

There won't be any reaction that will yield 14CO2.

Explanation:

In the given problem, it was stated that an experiment was conducted using acetyl-CoA that has a 14C label attached to each carbons of the acetyl group. However, the experiment was allowed to run through the first round of the citric acid cycle which has an unlabeled oxaloacetate and the whole process was monitored for the production of 14CO2. Based on the steps followed and the chemicals used for the experiment, there won't be any reaction that will yield 14CO2.