Multiple Choice
In proteins, what is the primary function of a peptide bond?
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4. Protein Structure
Peptide Bond
Multiple Choice
In proteins, what is the primary role of a peptide bond?
A
Binds amino acids to tRNA during translation
B
Creates disulfide bridges between two cysteine residues
C
Covalently links the carboxyl group of one amino acid to the amino group of another, forming the polypeptide backbone
D
Forms a noncovalent interaction between amino acid side chains that stabilizes tertiary structure
Verified step by step guidance1
Understand that a peptide bond is a specific type of covalent bond found in proteins.
Recall that amino acids are the building blocks of proteins, each containing an amino group (-NH2) and a carboxyl group (-COOH).
Recognize that during protein synthesis, the carboxyl group of one amino acid reacts with the amino group of another amino acid, releasing a molecule of water (a condensation reaction).
This reaction forms a covalent bond known as a peptide bond, which links amino acids together in a chain, creating the polypeptide backbone of proteins.
Distinguish the peptide bond from other interactions such as disulfide bridges (covalent bonds between cysteine residues) and noncovalent interactions that stabilize protein structure.
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