Question: which of these correctly describes the difference between membrane fusion and endocytosis?
Answer: So the sole difference between fusion and endocytosis is that in endocytosis, the virus just straight-up penetrates through the host while in fusion it's more meticulous about the envelope and capsid? ... Only enveloped viruses can enter a cell by fusion. Endocytosis uses a vesicle to bring the virus into the cell.