A-Level Biology - A-Level Biology - Lipids: Introduction - Structure | Functions | Tests (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. The structure and functions of lipids. * Elemental composition (carbon, hydrogen, oxygen). * Basic structure of a triglyceride (glycerol and fatty acids). * Key functions including energy storage, structure, insulation, and protection. 2. The differences between saturated and unsaturated fatty acids. * Structure of saturated fatty acids (no double bonds, straight chains). * Structure of unsaturated fatty acids (at least one double bond, kinked chains). * How structure affects properties like melting point (fats vs oils). 3. How to test for the presence of lipids in a food sample. * The method for the emulsion test using ethanol and water. * Identifying positive and negative results. *** CHAPTERS *** 0:00 Introduction to Lipids 0:27 Structure of Lipids 1:08 Fats and Oils 1:29 Functions of Lipids in Living Organisms 2:20 Saturated vs Unsaturated Fatty Acids 4:13 The Emulsion Test for Lipids *** PLAYLISTS *** https://youtube.com/playlist?list=PLidqqIGKox7VzYfPIVt8T09xOLNcolCe4&si=8JmDajxjtba6rdc3 https://youtube.com/playlist?list=PLidqqIGKox7UZ3mWhbHv2aA_1vnbsfRPq&si=q3hEKdA4v7kbfwMe https://youtube.com/playlist?list=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh&si=orIUwL3o2jOoiYjT https://youtube.com/playlist?list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g&si=DcihOwUkd9oWbbdp https://youtube.com/playlist?list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W&si=Y8MsO-FK948jnxpS https://youtube.com/playlist?list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7&si=-7i5Iq7yOeJrhtu6 https://youtube.com/playlist?list=PLidqqIGKox7VKJD2WxRhoKaI6JGLVean8&si=NH_Q1ujhVgACM2FU #alevel #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IB #AP