Draw peptide bonds and explain condensation.

In the subtopic Amino acids and proteins (A-level only), this AQA A-Level Chemistry 7405 learning objective focuses on draw peptide bonds and explain condensation. It belongs to Amino acids, proteins and DNA (A-level only), so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include peptide bond. Condensation reaction. means a chemical reaction where two molecules combine to form a larger molecule, with the loss of a small molecule, typically water Avoid the mistake of students often incorrectly draw the peptide bond by not showing the correct connection between the amine and carboxylic acid groups; instead, to correctly draw a peptide bond, remember that it forms between the carbon of the carboxylic acid group and the nitrogen of the amine group. The formula for the peptide bond is R1CO-NHR2, where R1 and R2 are the side chains of the amino acids. Ensure to illustrate the loss of a water molecule (H2O) during the condensation reaction For exam answers, when drawing peptide bonds, remember that they form through a condensation reaction between the amine group of one amino acid and the carboxylic acid group of another. This results in the release of a water molecule