A hemoglobin molecule contains
A) three protein chains, four heme groups, and two iron.
B) two protein chains, two heme groups, and four iron.
C) four protein chains, two heme groups, and two iron.
D) four protein chains, four heme groups, and four iron.
E) four protein chains, six heme groups, and two iron.

Question

Quizplus · Accepted Answer

A hemoglobin molecule consists of four protein chains (globins), each with one heme group, and each heme group contains one iron atom, totaling four heme groups and four iron atoms.

A Hemoglobin Molecule Contains