A-Level Biology - Proteins: Amino Acids | Dipeptides | How to Test for Proteins (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** WHAT'S COVERED ** 1. The structure and functions of proteins How amino acids (monomers) form dipeptides and polypeptides (polymers) The various roles of proteins, including as enzymes, antibodies, hormones, and structural components 2. The general structure of an amino acid The components of an amino acid: an alpha carbon, an amino group, a carboxyl group, and a variable R group The role of the R group in determining the properties of the 20 different amino acids 3. The synthesis and breakdown of dipeptides Formation of a peptide bond through a condensation reaction Breaking of a peptide bond through a hydrolysis reaction 4. The chemical test for proteins The procedure for the Biuret test Interpreting positive (purple) and negative (blue) results ** CHAPTERS ** 0:00 Introduction 0:31 Structure & Functions of Proteins 1:54 Structure of Amino Acids 2:52 How Dipeptides are Synthesised and Broken Down 4:01 How to Test for Proteins (The Biuret Test) ** PLAYLISTS **    • KS3 Biology      • KS3 Chemistry      • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • A-Level Biology   #Alevel #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IB #AP