Question

multiple choice question
in a hemoglobin molecule, what type of atom is at the center of a heme group?
potassium
iron
calcium
iodine

Explanation:

Hemoglobin is a protein in red - blood cells that carries oxygen. The heme group within hemoglobin has an iron (Fe) atom at its center, which is crucial for binding and transporting oxygen.

Answer:

B. Iron