Adult human RBCs are enucleate. Which of the following statement (s) is/are most appropriate explanation for this feature ? (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.A. Only (IV)B. Only (I)C. (I),(III) and (IV)D. (II) and (III)

Adult human RBCs are enucleate. Which of the following statement (s) i

1.	Adult human RBCs are enucleate. Which of the following statement (s) is/are most appropriate explanation for this feature ? (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.A. Only (IV)B. Only (I)C. (I),(III) and (IV)D. (II) and (III)
Answer» Correct Answer - A (a) The absence of nucleus in RBC is an adaptation that allows it to contain more haemoglobin and carry more oxygen by providing empty space. This adaptation also aids in effective diffusion of oxygen. Concept Enhancer RBCs are initially produced in bone marrow with a nucleus. They, then undergo enucleation at maturity , in which their nucleus is removed.

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