Which of the following bond in DNA links a 3' pentose sugar to a 5' pentose sugar?

Hydroxyl bond

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Phosphodiester bond

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Glycosidic bond

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None of the above

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Solution

The correct option is B Phosphodiester bond
Bond linking 3' pentose sugar to a 5' pentose sugar is the phosphodiester bond because the usually sugars form ester bonds. Here the formed ester bonds have a phosphate molecule in between them, so it called phosphodiester bond.
So, the correct option is 'Phosphodiester bond'.

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