Which of the following structures is correct | vedclass

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(D) $DNA$ molecule is a polymer of nucleotides. Each nucleotide consists of three components: a nitrogenous base $(NB)$,a pentose sugar $(S)$,and a ph

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(D) $DNA$ molecule is a polymer of nucleotides. Each nucleotide consists of three components: a nitrogenous base $(NB)$,a pentose sugar $(S)$,and a phosphate group $(P)$.In a nucleotide,the nitrogenous base is attached to the $1'$ carbon of the sugar,and the phosphate group is attached to the $5'$ carbon of the sugar.These nucleotides are linked together by phosphodiester bonds to form a polynucleotide chain. The backbone of the $DNA$ strand is formed by the alternating sugar and phosphate groups $(S-P-S-P...)$,with the nitrogenous bases $(NB)$ attached to each sugar molecule.Looking at the options,the structure where the phosphate group $(P)$ is attached to the sugar $(S)$,and the nitrogenous base $(NB)$ is also attached to the sugar $(S)$ in a repeating sequence represents the correct backbone structure of $DNA$.

Which of the following structures is correct for $DNA$?

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