Question

Select the wrong statements with respect to DNA.
(i) The backbone of DNA is formed by the sugar-phosphate chain.
(ii) The two strands of the polynucleotide are anti-parallel.
(iii) The nitrogen bases are parallel to the backbone.
(iv) The backbone contains a hydrogen bond.

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (iii) and (iv)
• D. (iv) and (i)

Answer 1

Answer: (C)

DNA is a double helical structure and is antiparallel in nature. The nitrogen bases are perpendicular to the backbone and are linked to each other by a phosphodiester bond.