Why membranes matter
Why membranes matter
Biological membranes are thin structures made mainly from lipids and proteins. The plasma membrane, also called the cell surface membrane, surrounds the cell, and other membranes surround organelles such as mitochondria and chloroplasts.
Step-by-step lessons on OCR A A Level Biology Biological membranes. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.