Which of the following statements most accurately describes the structure of hemoglobin?

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Hemoglobin consists of four polypeptide chains, each of which has a heme group containing a copper ion. One hemoglobin molecule can bind a total of four O2 molecules.

Hemoglobin consists of a single polypeptide chain with a heme center containing a copper ion that binds a molecule of O2.

Hemoglobin consists of four polypeptide chains, each of which has a heme group containing an iron ion. One hemoglobin molecule can bind a total of four O2 molecules.

Hemoglobin consists of a single polypeptide chain with a heme center containing an iron ion that binds a molecule of O2.

 

asked Dec 31, 2012 in Biology by anonymous
    

1 Answer

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Hemoglobin consists of four polypeptide chains, each of which has a heme group containing an iron ion. One hemoglobin molecule can bind a total of four O2 molecules.

 

answered Dec 31, 2012 by anonymous



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