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Solution


Q.

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature         [2017]

(1) They do not need to reproduce.
(2) They are somatic cells.
(3) They do not metabolise.
(4) All their internal space is available for oxygen transport.
1 Only (1)  
2 (1), (3) and (4)  
3 (2) and (3)  
4 Only (4)  

Ans.

(4)

Red blood cells of adult humans do not have cell organelles including nucleus, Golgi bodies, mitochondria, ribosomes, etc. It increases the surface area of RBCs and enables them to contain more haemoglobin (the oxygen carrying pigment).