Question

Each haemoglobin molecule can carry ________ oxygen molecules.

• A. six
• B. two
• C. eight
• D. four

Answer 1

The correct option is D four

Haemoglobin is the iron containing protein found in red blood cells. It is responsible for the transportation of oxygen and carbon dioxide. It consists of four protein chains and each chain has a haem group attached to it. Each haem group has an iron molecule. The oxygen binds to the iron molecule. Since there are four iron molecules, each haemoglobin is capable of carrying four oxygen molecules.