After a search of nucleotide sequence databases, researchers identified an ire in the 5' untranslated region of a gene encoding aconitase, an enzyme involved in the krebs cycle. which of the following pieces of experimental evidence best supports the claim that the synthesis of aconitase is controlled by a mechanism similar to ferritin regulation? a. irp binds to the aconitase mrna in the presence of ironb. the relative amount of aconitase protein increases in the presence of high levels of ironc. oxygen consumption by cells increases in the presence of high levels of irond. the levels of reduced electron carriers, nadh fadh2 increase in the presence of high levels of iron