BRAINCAKEPeptide Bond Formation
Amino acids join together by condensation reactions. The -OH from the carboxyl group of one amino acid combines with an -H from the amino group of another, and a molecule of water is removed.
The covalent bond that forms between the carbon of the carboxyl group and the nitrogen of the amino group is called a peptide bond, -CONH-. Two amino acids joined in this way form a dipeptide.
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Key terms in this lesson
- condensation reaction
- A reaction that joins two molecules together with a covalent bond, with the elimination of a water molecule.
- hydrolysis
- The breaking of a covalent bond within a molecule using a water molecule.
More in Biological Molecules
- Phospholipids
- Properties of Phospholipids
- Test for Lipids
- Amino-Acids
- Primary Structure
- Secondary Structure
- Tertiary Structure
- Quaternary Structure
All 29 lessons in Biological Molecules · All AQA AS-level Biology topics