Question

Name the metal present in Haemoglobin.

Answer 1

HIint : To find out the name of metal present in the haemoglobin you need to know the structure of haemoglobin and the type of bonding that takes place in the formation of this structure. . Haemoglobin is a red color pigment of blood and is observed exclusively in erythrocytes & myoglobin.

Complete step by step answer:
Haemoglobin is a chromo-protein found in the red blood cells of the human body whose function is to carry oxygen from the lungs to the tissues and return the carbon dioxide from the tissues to the lungs.
Haemoglobin is composed of a globular chain of $4$ protein molecules that are bonded together. The adult haemoglobin molecule contains $2\,\alpha -$ globin chains and $2\beta -$ globin chains
The $4$ units of protein are called the heme group. Each heme group contains an Iron ( $Fe$ ) atom attached to it. Heme is an iron-porphyrin complex in which iron is present in $F{e^{2 + }}$ (Ferrous) form.
The heme group is a metal complex in which $Fe$ is the central metal atom that binds or releases molecular oxygen. The protein and the heme group both undergo conformational changes on oxygenation and deoxygenation.
The Haemoglobin also helps in the elimination of $C{O_2}$ , which is produced as a waste product, during the gas exchange in the blood.
Hence, The metal which is Present is Haemoglobin is Iron.

Note:
$Fe$ metal in heme is held closely by the balanced forces of the $4\,{N_2}$ molecules. The ${N_2}$ molecules point toward the inside of the ring created by them. The double and single bonds in pyrroles are placed evenly in such a manner that the electrons remain balanced and the entire molecule remains stable. Blood is a Crucial and essential part of the human body as it contains many critical chemical systems that permit it to maintain the chemical atmosphere required for the survival of the body's metabolism.