Bonds that do not exist in tertiary structure of proteins:

Covalent bonds

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Phosphodiester bonds

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Hydrophobic interactions

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Ionic bonds

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Solution

The correct option is B Phosphodiester bonds
Tertiary structure of proteins is devoid of phosphodiester bonds. There bonds are present in nucleic acids. The tertiary structure of proteins are connected by monomers of amino acid by the peptide bond. The structure is composed of hydrogen bonds, ionic bonds and other interactions.
So, the correct option is 'b'.

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