The DNA strands are antiparallel to each othe | vedclass

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(B) The $DNA$ double helix consists of two polynucleotide chains that run in opposite directions,known as antiparallel orientation.This antiparallel n

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Phosphodiester bonds

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(B) The $DNA$ double helix consists of two polynucleotide chains that run in opposite directions,known as antiparallel orientation.This antiparallel nature is primarily determined by the specific chemical structure of the sugar-phosphate backbone and the base pairing rules.Specifically,the $5' \rightarrow 3'$ direction of one strand is opposite to the $3' \rightarrow 5'$ direction of the other strand.While $H$-bonds (hydrogen bonds) are responsible for holding the two strands together by pairing nitrogenous bases,the antiparallel orientation itself is a structural consequence of the phosphodiester bonds linking the nucleotides in a specific $5'-3'$ polarity.

The $DNA$ strands are antiparallel to each other due to the presence of:

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