The configuration of most α-carbon atoms of amino acids linked in a peptide bond is:
A) cis.
B) circular.
C) parallel.
D) trans.
E) perpendicular.

Question

Quizplus · Accepted Answer

The α-carbon atoms of amino acids linked in a peptide bond are typically in a trans configuration. This means that the functional groups attached to the α-carbon are on opposite sides of the peptide bond, resulting in a linear structure for the peptide backbone. A cis configuration is rare due to steric hindrance and is typically found only in specific amino acid residues, such as proline.

The Configuration of Most α-Carbon Atoms of Amino Acids Linked