38 7. The combination of O2 with haemoglobin depends upon. a) Entry of CO in blood blu increase of O2 in blood c) Increase in the amount of Co2 in blood d) Decrease in the amount of O2 in blood
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The protein inside (a) red blood cells that carries oxygen to cells and carbon dioxide to the lungs is (b) hemoglobin. Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen. It is the iron in hemoglobin that gives blood its red color.
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