An example of a disease caused by a molecular | vedclass

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(D) The correct answer is $D$. Sickle-cell anaemia is a classic example of a molecular disease caused by a point mutation in the gene encoding the $\b

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Sickle-cell anaemia

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(D) The correct answer is $D$. Sickle-cell anaemia is a classic example of a molecular disease caused by a point mutation in the gene encoding the $\beta$-globin chain of haemoglobin.This mutation results in the substitution of glutamic acid with valine at the $6^{th}$ position of the $\beta$-globin chain.This change in the amino acid sequence alters the molecular structure of the haemoglobin protein,causing the red blood cells to become sickle-shaped under low oxygen tension.

An example of a disease caused by a molecular mutation is

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