Multiple choice Which among the following does not characterise DNA molecule? It is composed of nitrogen bases, phosphates and sugars. It is double helix. The two polynucleotide chains are antiparallel. The distance between two successive sugar molecules is 34A0. Reveal answer Fill a bubble to check yourself D Correct answer Explanation One full turn of the helix, called gyre, measures 34A0 in length. The distance between two successive sugar molecules is 3.4A0. Thus, each gyre accommodates 10 nucleotides.