BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
CARDIOVASCULAR SYSTEM
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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hemoglobin
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bone marrow
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leukocytes
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erythrocytes
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platelets (thrombocytes)
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Detailed explanation-1: -hemoglobin, also spelled haemoglobin, iron-containing protein in the blood of many animals-in the red blood cells (erythrocytes) of vertebrates-that transports oxygen to the tissues. Hemoglobin forms an unstable reversible bond with oxygen.
Detailed explanation-2: -The hemoglobin 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. From the molecular weight of Hb, one can calculate that 1 g of Hb can combine with 1.39 ml of oxygen.
Detailed explanation-3: -It is composed of a protein called heme, which binds oxygen.
Detailed explanation-4: -So, the correct answer is ‘Ionic bond’.
Detailed explanation-5: -Heme groups and globins In fact, hemoglobin is composed of four globin proteins-two alpha chains and two beta chains-each with a heme group. The heme group contains one iron atom, and this can bind one molecule of oxygen.