Multiple choice

The defective type of haemoglobin in sickle cell anaemia has _________ red–blood corpuscles.

  1. sickle – shaped

  2. dead

  3. round – shaped

  4. normal
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A Correct answer
Explanation

Sickle cell anaemia is a genetic disorder in which the haemoglobin is defective and not efficient in O2 transport. This defective haemoglobin distorts the shape of RBC in which it is stored and they look sickle-shaped. Hence, the name “sickle cell” is derived. Being sickle shaped, it is difficult for the RBCs to move more freely in the blood vessels and so supply of oxygen to different organs and cells become slow and hence, respiration and release of energy becomes low, thereby making us feel lethargic. 

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