Multiple Choice
In the backbone of a polypeptide, between which two atoms are peptide bonds located?
30. Peptides and Proteins
Peptides
Struggling with Organic Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How is a peptide bond formed in the synthesis of peptides?
A
By the addition of a phosphate group to the amino acid chain
B
By the oxidation of the amino acid backbone
C
By the condensation reaction between the amino group of one amino acid and the carboxyl group of another amino acid
D
By the hydrogenation of the amino acid side chains
Verified step by step guidance1
Understand that a peptide bond is a covalent bond that links two amino acids together in a protein or peptide chain.
Recognize that the formation of a peptide bond involves a condensation reaction, which is a type of chemical reaction where two molecules combine with the loss of a small molecule, typically water.
Identify the functional groups involved in the peptide bond formation: the amino group (\(\text{-NH}_2\)) of one amino acid and the carboxyl group (\(\text{-COOH}\)) of another amino acid.
During the condensation reaction, the hydroxyl group (\(\text{-OH}\)) from the carboxyl group of one amino acid and a hydrogen atom (\(\text{-H}\)) from the amino group of the other amino acid are removed, forming a molecule of water (\(\text{H}_2\text{O}\)).
The remaining atoms from the amino and carboxyl groups form a new covalent bond, known as the peptide bond, linking the two amino acids together in the chain.
Related Videos
Related Practice
