Question

Iron containing haeme is attached with globin of haemoglobin as

• A. Coenzyme
• B. Apoenzyme
• C. Prosthetic group
• D. Inorganic group

Answer 1

The correct option is C Prosthetic group

Prosthetic group is the non proteinaceous compound which is essential for the functioning of biological proteins. Metal ions such as Fe, Co, Mg etc. act as prosthetic group. Haem is a large iron (Fe) containing molecule which gives haemoglobin red colour. It is non proteinaceous part of haemoglobin and thus, it is a prosthetic group. It is responsible for binding to oxygen that is transported by haemoglobin in the blood streams during respiration.

So, the correct answer is 'Prosthetic group'.