What is essential for transport of oxygen in red blood cells?

Biology · High School · Mon Jan 18 2021

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Correct answer is haemoglobin. 

Hemoglobin (Heme + Globin) The protein hemoglobin is a molecule which is responsible for carrying almost all of the oxygen in the blood. It is composed of four subunits, each with a heme group plus a globin chain. The heme group is composed of a porphyrin ring which contains an iron (Fe) atom in its center.