Normal adult haemoglobin contains________________?
Correct answer: B. Two alpha chains and two beta chains
- A. One alpha chain and one beta chain
- B. Two alpha chains and two beta chains
- C. One beta chains and two alpha chains
- D. One alpha chains and two beta chains
Explanation
Normal adult hemoglobin A is HbA, composed of two alpha and two beta chains, written α2β2. A single alpha or beta chain cannot form normal adult hemoglobin.
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