QID 403675:

Question requires the explicit knowledge that the conversion of acetyl-CoA to malonyl-CoA is part of the process of fatty acid synthesis. Knowledge of this being part of FA synthesis specifically is necessary to contrast it with the actions of another factor given in the passge, to determine if its action is similar to, or opposing. The other factor is explicitly involved in down-regulating fatty acid synthesis, so the two are opposed, but it requires knowing explicitly that acetyl-to-malonyl is going the other direction (synthesis rather than oxidation) of fatty acids to select the appropriate relationship and, thus, appropriate answer.