Which of the following disorders is caused by | vedclass

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$(A)$ Sickle-cell anaemia is a qualitative defect where a single amino acid substitution (glutamic acid to valine) occurs in the globin chain, leading

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Sickle-cell anaemia

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$(A)$ Sickle-cell anaemia is a qualitative defect where a single amino acid substitution (glutamic acid to valine) occurs in the globin chain, leading to abnormal haemoglobin structure.Thalassemia is a quantitative defect where there is a reduced synthesis of one of the globin chains ($\alpha$ or $\beta$ chains).However, the question specifically asks for a qualitative defect in the synthesis of globin molecules that impairs $O_2$ transport.Sickle-cell anaemia is the classic example of a qualitative defect in the globin molecule structure.Therefore, the correct option is $A$.

Which of the following disorders is caused by a qualitative defect in the synthesis of globin molecules, leading to impaired $O_2$ transport?

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