This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Clathrin is used in: 
Select and explain. 
A. Receptor mediated endocytosis, B. Exocytosis, C. Cell adhesion, D. All
A: Receptor mediated endocytosis
Answer: A: Receptor mediated endocytosis 
Explanation: Clathrin and megalin are associated with endocytosis Endocytosis is a vesicular transpo system, it is an active process