Question

The correct statement in respect of protein haemoglobin is that it

• A. functions as a catalyst for biological reactions
• B. maintains blood sugar level
• C. act as an oxygen carrier in the blood
• D. forms antibodies and offers resistance to diseases

Answer 1

The Correct Option is C

To determine the correct statement about the protein haemoglobin, let's analyze each option:

1. Functions as a catalyst for biological reactions: Haemoglobin is not an enzyme and does not function as a catalyst for biological reactions. Enzymes are proteins that speed up chemical reactions, while haemoglobin's primary function is related to oxygen transport.

2. Maintains blood sugar level: Haemoglobin does not regulate blood sugar levels. This function is primarily associated with hormones like insulin and glucagon, not haemoglobin.

3. Acts as an oxygen carrier in the blood: This statement is correct. Haemoglobin is a red protein found in red blood cells that is responsible for transporting oxygen from the lungs to the rest of the body. It binds with oxygen in the lungs, and this oxygen is then released to cells throughout the body.

4. Forms antibodies and offers resistance to diseases: Antibodies are proteins used by the immune system to neutralize pathogens like bacteria and viruses. Haemoglobin does not perform this function; instead, it is involved in oxygen transport.

Considering the analysis above, the correct answer is that haemoglobin acts as an oxygen carrier in the blood.

Conclusion: Haemoglobin's primary role is the transportation of oxygen, making it crucial for cellular respiration and energy production in the body.