Which of the following is not a part of hemoglobin molecule___________?
Correct answer: A. Ferric ions
- A. Ferric ions
- B. Vinyl groups
- C. Histidine
- D. Pyrrole rings
Explanation
Hemoglobin contains ferrous iron, Fe2+, within heme, not ferric iron, Fe3+. Pyrrole rings, vinyl groups and histidine residues are structural components associated with hemoglobin.
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