Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature ?(a) They do not need to reproduce(b) They are somatic cells(c) They do not metabolize(d) All their internal space is available f…

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

(a) They do not need to reproduce

(b) They are somatic cells

(d) All their internal space is available for oxygen transport

Options :

1. Only (a)

2. (a), (c) and (d)

3. (b) and (c)

4. Only (d)

Doubtly Asked 30 Oct 2026 NEET UG 2017 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 2. (a), (c) and (d)

Key idea: Losing the nucleus suits the RBC for its single job, carrying oxygen.

(a) Mature RBCs do not divide, so they need no nucleus for reproduction.
(b) Being somatic is no reason; most somatic cells keep their nucleus.
(c) RBCs have no mitochondria and respire anaerobically, so they do not use the oxygen they carry. The official key treats this as acceptable.
(d) With no nucleus, more space is free for haemoglobin and so for oxygen transport.

So (a), (c) and (d) are accepted. Answer: (2).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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