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Questions and Answers
Which of the following statements about haemoglobin and myoglobin is correct?
Which of the following statements about haemoglobin and myoglobin is correct?
- Each molecule of haemoglobin has one iron-containing haem group, while myoglobin has four iron-containing haem groups.
- Haemoglobin is found in muscles, while myoglobin is found in red blood cells (RBCs).
- Haemoglobin can bind to one oxygen molecule, whereas myoglobin can bind to four oxygen molecules. (correct)
- Haemoglobin consists of one polypeptide chain, while myoglobin consists of four polypeptide chains.
What is the main function of haemoglobin?
What is the main function of haemoglobin?
- Releasing oxygen more readily than myoglobin
- Storing oxygen in muscle tissues
- Binding to oxygen more tightly than myoglobin
- Transporting oxygen throughout the body (correct)
At what partial pressure of oxygen (PO2) does myoglobin lose oxygen?
At what partial pressure of oxygen (PO2) does myoglobin lose oxygen?
- 20 mmHg (correct)
- 40 mmHg
- 60 mmHg
- 80 mmHg
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