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nmdcat.online June 27, 2026

The structural component responsible for the formation of a peptide bond in proteins is the reaction between the

A. Carboxyl group of one amino acid and the amino group of another
✓
B. R-group of one amino acid and the amino group of another
C. Amino group of one amino acid and the hydrogen atom of another
D. Carboxyl group of one amino acid and the R-group of another

📝 Explanation

A peptide bond is a covalent bond formed via a dehydration reaction between the α-carboxyl group (-COOH) of one amino acid and the α-amino group (-NH2) of another, releasing a water molecule. R-groups are involved in tertiary structure interactions, not the primary backbone linkage.

📖 Additional Information

  • Carboxyl group of one amino acid and the amino group of another
  • R-group of one amino acid and the amino group of another
  • Amino group of one amino acid and the hydrogen atom of another
  • Carboxyl group of one amino acid and the R-group of another

A peptide bond is a covalent bond formed via a dehydration reaction between the α-carboxyl group (-COOH) of one amino acid and the α-amino group (-NH2) of another, releasing a water molecule. R-groups are involved in tertiary structure interactions, not the primary backbone linkage.

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