Which of the following statements are correct regarding the salient features of DNA double helix?
(a) It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project outside.
(b) The two chains have anti-parallel polarity. It means, if one chain has the polarity 5'â3', the other has 3'â5'.
(c) There are roughly 10 bp in each turn of double helix.

Question

Which of the following statements are correct regarding the salient features of DNA double helix?

(a) It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project outside.

(b) The two chains have anti-parallel polarity. It means, if one chain has the polarity 5'â3', the other has 3'â5'.

(c) There are roughly 10 bp in each turn of double helix.

Infinity Learn · Accepted Answer

The two chains have $$anti-parallel$$ polarity. It means, if one chain has the polarity $$5$$'â$$3$$', the other has $$3$$'â$$5$$'.The two chains are coiled in a $$right-handed$$ fashion. The pitch of the helix is $$3.4$$ nm and there are roughly $$10$$ bp in each turn.It is made of two polynucleotide chains, where the backbone is constituted by $$sugar-phosphate$$, and the bases project inside.

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material