Question

DNA is absent in _______________.

• A. Mature spermatozoan
• B. Mature RBC
• C. Hair root
• D. ovum

Answer 1

The correct option is B Mature RBC

Red blood cells lack cell organelle and nucleus. Since RBCs do not have a nucleus hence DNA is absent in RBC. The absence of a nucleus is an adaptation of the red blood cell for its role. It allows the red blood cell to contain more hemoglobin and, therefore, carry more oxygen molecules. It also allows the cell to have its distinctive bi-concave shape which aids diffusion.

So, the correct answer is 'Mature RBC'.