The correct answer is D.

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Formation of a peptide bond, which is the primary covalent bond found in proteins (B), involves a condensation reaction between the amine group of one amino acid and the carboxyl group of an adjacent amino acid (A). As a result of the carbonyl group present at the bond, the double bond resonates between C=O and C=N. This resonance gives the peptide bond a partial double-bond character (C) and limits the rotation about the bond. We can see that choices (A), (B), and (C) are all characteristics of the peptide bond. Choice (D) is false because the formation of the peptide bond is a condensation reaction (involving the loss of water) rather than a hydration reaction (which involves the addition of water).