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Through which among the following linkages are the two nucleotides connected through the 3’-5’ end?

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in Biology – Class 12 by (271k points)
Through which among the following linkages are the two nucleotides connected through the 3’-5’ end?

(a) Phosphodiether linkage

(b) Phosphodisulphide linkage

(c) Phosphodinitrate linkage

(d) Phosphodiester linkage

I got this question in an online interview.

This interesting question is from Structure of a Polynucleotide Chain topic in section Molecular Basis of Inheritance of Biology – Class 12

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Best answer
The correct option is (d) Phosphodiester linkage

The best I can explain: When two nucleotides come close to each other, they form a linkage. This linkage is seen from the 3’-5’ end. This type of a linkage is called as the phosphodiester linkage. A phosphodiester linkage between 2 nucleotides forms a dinucleotide.

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