In human beings, which of the following has a high affinity for oxygen?

Correct option is A

The correct answer is (a) Haemoglobin.
· Haemoglobin is a protein found in red blood cells that has a high affinity for oxygen.
· It binds to oxygen molecules in the lungs and carries them through the bloodstream to various tissues and organs.
· Each haemoglobin molecule can bind up to four oxygen molecules, making it highly efficient in oxygen transport.
· The binding of oxygen to haemoglobin is reversible, allowing it to release oxygen where it is needed in the body.
Information Booster:
· Carbon dioxide: Transported in the blood but does not have a high affinity for oxygen. It is carried back to the lungs for exhalation.
· White blood cells: Part of the immune system, responsible for fighting infections and foreign substances, not involved in oxygen transport .
· Melanin: A pigment found in the skin, hair, and eyes, responsible for coloration and protection against UV radiation, not involved in oxygen transport.