15. Multiple Choice. Imagine that you have purified acetyl-CoA carboxylase and purified fatty acid synthase. Imagine also that you have acetyl-CoA that is labeled with 4C at the carbonyl carbon of the acetyl group. If you set up an in vitro reaction with the above components/molecules and with unlabeled bicarbonate ion and all the necessary cofactors in sufficient supply, where would the labeled carbons appear on the resulting palmitate molecules that are synthesized? A) every C B) every even-numbered C C) every odd-numbered C D) no part of the molecule E) only the omega-carbon (the methyl carbon of the resulting palmitates)