REQUIRED PRACTICAL 4 - AQA A LEVEL BIOLOGY

🧪 AQA A Level Biology - Required Practical 4 | Cell Membrane Permeability Investigation + Exam Question In this video, I walk you through Required Practical 4 for AQA A Level Biology: Investigation into the effect of a named variable on the permeability of cell-surface membranes. This is key practical knowledge for both your practical endorsement and exam prep. ✅ What’s included: Background theory behind membrane permeability Step-by-step method Risk assessment and control variables How to record and interpret results An exam-style question with a full mark scheme breakdown 🎯 Perfect for: AQA A Level Biology practical revision Prepping for assessed practical write-ups Improving exam technique for practical application questions 💬 Got a question or request? Drop it in the comments—I’m always happy to help!