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Biomolecules
Proteins and their Functions
1 question from 1 paper, each with its answer.
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Concepts tested
- Function of haemoglobin
All Questions
2004 AIPMT 1 question
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The correct statement in respect of protein haemoglobin is that it :-Haemoglobin is a globular protein present in red blood cells. It contains four polypeptide chains, each with an iron-containing haem group.
The $Fe^{2+}$ of haem binds oxygen reversibly to form oxyhaemoglobin in the lungs, and releases it in the tissues.
So haemoglobin acts as an oxygen carrier in the blood.
Blood sugar level is maintained by the hormone insulin (and glucagon); antibodies are formed by immunoglobulins; biological reactions are catalysed by enzymes.