Question

A molecule of haemoglobin carries oxygen molecules

Answer 1

• The haemoglobin comprises of globin and haem.
• Globin is the protein chain and haem is the red pigment that gives the blood its red colour.
• There are $4$ protein chains and $4$ haems.
• Each haem has an iron at it’s centre. So with every iron one oxygen molecule can bind.
• As a result of which every haemoglobin had four oxygen along with them riding in the RBC.
• And the haemoglobin turns into oxyhaemoglobin.
• Hence, option D is correct.