NEET BIOLOGY

Detailed explanation-1: -Hemoglobin is an allosteric protein. When one heme group in hemoglobin binds oxygen, it is easier for successive oxygen molecules to bind at the remaining three sites. Thus, once oxygenation occurs at one heme, there is cooperation at all other sites in hemoglobin.

Detailed explanation-2: -Haemoglobin is a conjugated protein. It consists of a basic protein globin joined to a non-protein group heme, hence the name haemoglobin. A mammalian hemoglobin molecule is a complex of 4 heme molecules joined with 4 globin molecules.

Detailed explanation-3: -Hemoglobin is a complex protein which has a quaternary structure and contains iron. There are four subunits in the hemoglobin molecule-two alpha subunits and two beta subunits.

Detailed explanation-4: -We’ve already encountered one example of a protein with quaternary structure: hemoglobin. As mentioned earlier, hemoglobin carries oxygen in the blood and is made up of four subunits, two each of the and types.