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How many molecules of oxygen can bind with one molecule of haemoglobin?

Dear student, 4 oxygen molecules can bind to one molecule of hemoglobin. Each hemoglobin molecule consists of the 4 heme groups, and each of the heme group contains iron atom in the centre which binds with an oxygen molecule. Thus 1 hemoglobin molecule binds with the 4 molecules of oxygen. Regards.

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Dear student,

Each haemoglobin molecule contains four heme groups with iron cores to which oxygen binds. Therefore, one molecule of haemoglobin can bind four molecules of oxygen.

Regards
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Dear Student,

The answer is four.

The haemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.

Hope this helps!
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