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Questions and Answers
What is the difference between haemoglobin and myoglobin in terms of their structure and function?
Haemoglobin consists of four polypeptide chains and possesses four iron-containing haem groups. It is found in RBCs and transports oxygen. Myoglobin consists of one polypeptide chain and possesses one iron-containing haem group. It is found in muscles and stores oxygen.
What is the affinity of haemoglobin and myoglobin with oxygen?
Haemoglobin has less affinity with oxygen, while myoglobin has more affinity with oxygen.
At what partial pressure of oxygen (PO2) does haemoglobin lose oxygen?
Haemoglobin loses oxygen at PO2 60 mmHg.
At what partial pressure of oxygen (PO2) does myoglobin lose oxygen?
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