Why Are Red Blood Cells Altered in Shape in Sickle-Cell

question 179

Multiple Choice

Why are red blood cells altered in shape in sickle-cell anemia?

• A) Iron is no longer present within the haemoglobin molecule.
• B) Haemoglobin is missing two of its polypeptide chains.
• C) Lack of oxygen interferes with haemoglobin replication.
• D) The amino acid sequence is abnormal in two of the polypeptide chains.

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