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The correct statement in respect of protein haemoglobin is that it     [2004]
  • a)
    functions as a catalyst for biologicalreactions
  • b)
    maintains blood sugar level
  • c)
    acts as an oxygen carrier in the blood
  • d)
    forms antibodies and offers resistance todieases
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The correct statement in respect of protein haemoglobin is that it [2...
Haemoglobin acts as an oxygen carrier in
the blood since it reacts with oxygen to form
unstable oxyhaemoglobin which easily
breaks to give back haemoglobin and
oxygen.
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Most Upvoted Answer
The correct statement in respect of protein haemoglobin is that it [2...
Hemoglobin in the blood carries oxygen from the respiratory organs (lungs or gills) to the rest of the body (i.e. the tissues) where it releases the oxygen to burn nutrients to provide energy to power the functions of the organism, and collects the resultant carbon dioxide to bring it back to the respiratory organs to be dispensed from the organism;

hence the
Ans is (c)
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Community Answer
The correct statement in respect of protein haemoglobin is that it [2...
Introduction:
Hemoglobin is an essential protein found in red blood cells that plays a vital role in transporting oxygen from the lungs to various tissues and organs in the body. It is composed of four subunits, each containing a heme group, which is responsible for binding and carrying oxygen.

Explanation:
The correct statement in respect to protein hemoglobin is that it acts as an oxygen carrier in the blood. Let's understand why this statement is correct:

1. Oxygen Transport:
One of the primary functions of hemoglobin is to bind to oxygen and transport it throughout the body. When oxygen is inhaled, it diffuses into the lungs and binds to the iron atoms in the heme group of hemoglobin. This forms oxygenated hemoglobin, which then travels through the bloodstream to reach tissues and organs. At the tissue level, oxygen is released from hemoglobin and utilized for cellular respiration, where it is essential for energy production.

2. Oxygen Dissociation:
Hemoglobin has the ability to bind and release oxygen in a controlled manner. This characteristic allows it to pick up oxygen in the lungs, where the oxygen concentration is high, and release it in the tissues, where the oxygen concentration is low. This phenomenon is known as oxygen dissociation and is regulated by various factors such as pH, temperature, and carbon dioxide levels.

3. Cooperative Binding:
Hemoglobin exhibits cooperative binding, which means that the binding of one oxygen molecule to a heme group increases the affinity of the remaining heme groups for oxygen. This property allows hemoglobin to efficiently pick up oxygen in the lungs and release it in the tissues, ensuring a continuous supply of oxygen to the body.

Conclusion:
In conclusion, the correct statement in respect to protein hemoglobin is that it acts as an oxygen carrier in the blood. Hemoglobin binds to oxygen in the lungs and carries it to various tissues and organs in the body, ensuring the supply of oxygen for cellular respiration and energy production.
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