A-Level Biology - Lipids: Triglycerides & Phospholipids | Cholesterol (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** WHAT'S COVERED ** 1. Structure and Function of Triglycerides The components of a triglyceride: a glycerol backbone and three fatty acid tails. The difference between saturated and unsaturated fatty acid chains. Adaptations of triglycerides for energy storage, including their non-polar nature. 2. How Triglycerides are Synthesised and Broken Down The formation of ester bonds through condensation reactions. The breakdown of ester bonds through hydrolysis reactions. 3. Structure and Function of Phospholipids The components of a phospholipid, including the phosphate group. The properties of the hydrophilic head and hydrophobic tails. How phospholipids form a bilayer to create cell membranes. 4. Structure and Function of Cholesterol The structure of cholesterol as a type of lipid called a sterol. Cholesterol's role in making vitamin D, steroid hormones, and bile. How cholesterol regulates the stability and fluidity of animal cell membranes. ** EXAM BOARD INFO ** AQA - You don't need to know about the structure and function of cholesterol OCR - Everything is relevant to your course! CIE - You don't need to know about the structure and function of cholesterol ** CHAPTERS ** 0:00 Introduction to Lipids 0:33 Structure and Function of Triglycerides 2:04 How Triglycerides are Synthesised and Broken Down 2:58 Structure and Function of Phospholipids 4:42 Structure and Functions of Cholesterol ** 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