Question

Which of the following statements best describes the structure of a hemoglobin molecule?Hemoglobin is composed of four globin molecules, each of which contains millions of heme groups.Hemoglobin is composed of two globin molecules, both with their own heme group that binds to and carries oxygen.Hemoglobin is composed of four globin molecules, each with their own heme group that binds to and carries oxygen.Hemoglobin is composed of three globin molecules and one heme group per hemoglobin molecule.

Answer 1

The best option is Hemoglobin is composed of four globin molecules, each with their own heme group that binds to and carries oxygen.

Hemoglobin has a quaternary structure it carries oxygen in red blood cells.