Answer:
The envelopes are typically derived from portions of the host cell membranes (phospholipids and proteins), but include some viral glycoproteins. They may help viruses avoid the host immune system. Glycoproteins on the surface of the envelope serve to identify and bind to receptor sites on the host's membrane. The viral envelope then fuses with the host's membrane, allowing the capsid and viral genome to enter and infect the host.[citation needed]
All enveloped viruses also have a capsid, another protein layer, between the envelope and the genome.
Step-by-step explanation:
The bacteria cell envelope is a complex multilayered structure that serves to protect these organisms from their unpredictable and often hostile environment.