Extremadura PAU Biology Practice Questions - Extremadura PAU Biology Examination - UEx (Biología 2o Bachillerato 2026) Exam

What type of chemical covalent bond joins adjacent amino acid residues in a polypeptide chain?

Peptide bond (amide bond between alpha-carboxyl and alpha-amino groups). Glycosidic bond between hydroxyl groups. Phosphodiester bond between 3'-OH and 5'-phosphate groups. Ester bond between fatty acid carboxyl and glycerol hydroxyl groups.

Correct Answer:

Peptide bond (amide bond between alpha-carboxyl and alpha-amino groups).

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