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Multiple Choice
During the formation of a peptide bond between two amino acids, which molecule is released as a byproduct?
A
Ammonia ()
B
Molecular oxygen ()
C
Water ()
D
Carbon dioxide ()
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1
Understand that a peptide bond forms between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid.
Recognize that during this bond formation, a condensation reaction occurs, meaning a small molecule is released as a byproduct.
Identify the groups involved: the hydroxyl group (-OH) from the carboxyl end and a hydrogen atom (H) from the amino group combine to form the byproduct.
Write the chemical equation representing the reaction: two amino acids combine to form a dipeptide plus the byproduct molecule.
Conclude that the byproduct released during peptide bond formation is water (H\_2O), as it results from the combination of -OH and H.