1.

Optical activity of DNA is due to its(a) bases(b) sugars(c) phosphates(d) hydrogen bonds

Answer»

Answer is : (b) sugars

DNA polymer is made up of nitrogenous base, a sugar and one or more phosphate. Optical activity results due to the molecular asymmetry. The nucleic acid bases have a plane of symmetry. Hence, they do not induce optical activity. Sugars are asymmetric and cause optical activity of DNA.



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