$2$b$)$ If the cell described in #$2$a$,$ with the mutant form of the Iron Response Factor that can bind to its binding site $($the Iron Response Dlement$)$ under any intracellular iron conditions, acquired a second mutation that altered the IRE sequence in the ferritin mRNA so that it was not recognized by the IRF protein, would this mutation be a reversion of the first mutation, in the IRF? Why or why not? $(2$ points$)$