Sickle-cell anemia is caused by a genetic mutation that produces an abnormal form of hemoglobin, the protein that carries oxygen in red blood cells. This abnormal hemoglobin causes red blood cells to become C-shaped, like a sickle, instead of the normal disc-shaped cells. These sickle cells can block blood flow, leading to pain, organ damage, and an increased risk of infections.

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Sickle-Cell Anemia

Question 7

Multiple Choice

Sickle-cell anemia

A) is caused by a lack of protein.
B) is caused by a lack of iron.
C) causes unusually shaped red blood cells.
D) causes unusually shaped blood vessels.

Correct Answer: