What is the reason for the anti-parallel natu | vedclass

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(D) The $DNA$ double helix consists of two polynucleotide chains that run in opposite directions,a property known as anti-parallelism. This orientatio

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(D) The $DNA$ double helix consists of two polynucleotide chains that run in opposite directions,a property known as anti-parallelism. This orientation is primarily determined by the chemical structure of the sugar-phosphate backbone,where the $5'$ end of one strand is aligned with the $3'$ end of the other. While hydrogen bonds hold the nitrogenous bases together,they do not dictate the anti-parallel orientation itself. Phosphodiester bonds link the nucleotides within a single strand,but the anti-parallel arrangement is a structural consequence of the polarity of the deoxyribose sugar and the specific orientation of the phosphodiester linkages between the $3'$ and $5'$ carbons. Therefore,none of the provided bond types are the direct cause of the anti-parallel nature; it is a result of the molecular geometry of the nucleotides.

Column-$I$	Column-$II$
$P$. Bacteriophage $\phi \times 174$	$I$. $5386$ nucleotides
$Q$. Bacteriophage lambda	$II$. $48502 \, bp$
$R$. Escherichia coli	$III$. $3.3 \times 10^9 \, bp$
$S$. Human haploid $DNA$	$IV$. $4.6 \times 10^6 \, bp$

What is the reason for the anti-parallel nature of $DNA$ strands?

Similar Questions

Match the following columns:

Column-$I$ Column-$II$

$P$. Bacteriophage $\phi \times 174$ $I$. $5386$ nucleotides

$Q$. Bacteriophage lambda $II$. $48502 \, bp$

$R$. Escherichia coli $III$. $3.3 \times 10^9 \, bp$

$S$. Human haploid $DNA$ $IV$. $4.6 \times 10^6 \, bp$

With which nitrogenous base does $Adenine$ pair?

In the structure of $DNA$,which bond connects $Adenine$ with $Thymine$?

The structure of $DNA$ is formed by the repetition of which units?

What is present at the $5'$ end of the sugar in a polymer of nucleotides?

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