PHYSIOLOGY
BLOOD PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cobalt
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Iron
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Copper
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Iodine
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Detailed explanation-1: -As its name suggests, hemoglobin is composed of “heme” groups (iron-containing rings) and “globins” (proteins). 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.
Detailed explanation-2: -There are four iron atoms in each molecule of hemoglobin, which accordingly can bind four molecules of oxygen. Globin consists of two linked pairs of polypeptide chains.
Detailed explanation-3: -These heme groups contain positively charged iron (Fe2+) molecules, which can reversibly bind to oxygen molecules and transport them to various areas of the body. Hence, option B is correct.