Multiple Choice
Which of the following correctly describes the functional groups involved and the bond formed during the dehydration reaction that creates a peptide bond between two amino acids?
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4. Protein Structure
Peptide Bond
Multiple Choice
In proteins, what is the primary function of a peptide bond?
A
To bind oxygen reversibly in heme-containing proteins through coordination to iron
B
To store genetic information by linking nucleotides through phosphodiester bonds
C
To stabilize protein tertiary structure by forming disulfide bridges between cysteine side chains
D
To covalently link two amino acids by joining the carboxyl group of one to the amino group of another, forming the polypeptide backbone
Verified step by step guidance1
Understand that a peptide bond is a specific type of covalent bond found in proteins.
Recognize that peptide bonds form between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid.
Know that this bond formation results in the release of a water molecule, a process called a condensation or dehydration reaction.
Realize that peptide bonds link amino acids together to form the polypeptide backbone, which is the primary structure of proteins.
Distinguish peptide bonds from other types of bonds or interactions in proteins, such as disulfide bridges (which stabilize tertiary structure) or coordination bonds in heme proteins.
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