Question

Which among the following is the most abundant protein in animal world?

• A. Collagen
• B. Haemoglobin
• C. Trypsin
• D. Insulin

Answer 1

Answer: (B)

Haemoglobin

Haemoglobin is a respiratory pigment and most abundant protein in animals. The haemoglobin present in the RBC combine with oxygen to form oxyhaemoglobin and transports the oxygen to different part of the tissue. On reaching the tissues the bond between the oxygen and haemoglobin breaks and it releases oxygen. One haemoglobin molecule binds to four oxygen molecule. Some of the oxygen is transported by the plasma in dissolved form.

So, the correct answer is option B.