AP BIOLOGY

Detailed explanation-1: -A virus that has an outer wrapping or envelope. This envelope comes from the infected cell, or host, in a process called “budding off.” During the budding process, newly formed virus particles become “enveloped” or wrapped in an outer coat that is made from a small piece of the cell’s plasma membrane.

Detailed explanation-2: -A viral envelope is the outermost layer of many types of viruses. It protects the genetic material in their life cycle when traveling between host cells. Not all viruses have envelopes.

Detailed explanation-3: -For enveloped viruses, delivery of the viral genome across the lipid bilayer of the virus and a cellular membrane is accomplished by a membrane fusion reaction. For nonenveloped viruses, the viral genome is usually delivered across a cellular membrane by a pore that is formed by protein components of the viral capsid.