In what oxidation state must the iron atom be for heme to bind oxygen?
A) 0, Fe(0)
B) 1+, Fe(I)
C) 2+, Fe(II)
D) 3+, Fe(III)
E) There is no required oxidation state for the iron.

Question

Quizplus · Accepted Answer

Iron must be in the +2 oxidation state, or Fe(II), for heme to effectively bind oxygen. This is the functional state of iron in hemoglobin, allowing for oxygen transport in the blood.

In What Oxidation State Must the Iron Atom Be for Heme