Question

Name any two oxygen carrier and give their importance in biological system

Answer 1

Each subunit surrounds a central heme group that contains iron and binds one oxygenmolecule, allowing each hemoglobin molecule to bind four oxygen molecules. Molecules with more oxygen bound to the heme groups arebrighter red. ... It is the iron in hemoglobin that gives blood its red color.

Answer 2

Answer:      

Myoglobin and haemoglobin are two proteins that store and transport oxygen in our bodies.

Explanation:

Myoglobin

• Myoglobin is a monomeric protein present in the striated muscles of the body, which includes the skeletal muscles.
• When blood oxygen transport is insufficient during periods of strong muscle activity, myoglobin functions as a local oxygen reserve that can temporarily provide oxygen.

Haemoglobin

• It is made up of four subunits, each of which contains a heme group as well as a globin chain. The heme group is made up of a porphyrin ring with an iron ($Fe$) atom in the centre.
• It's a protein found in red blood cells that distributes oxygen to your body's organs and tissues while also transporting carbon dioxide back to your lungs.
• Haemoglobin is a four-subunit metalloprotein made comprised of an iron-containing heme group linked to a globin polypeptide chain. Each haemoglobin may carry four oxygen molecules by binding one molecule of oxygen to the iron atom of a heme group.