Question: The SARS- CoV-2 virus is covered by a lipid bilayer with spike proteins attached. This bilayer is produced by an infected cell and protects the RNA inside the virus. This bilayer could be considered a biological membrane according to the Fluid Mosaic Model of Membrane because Question Answer it contains integral membrane proteins small polar and larger non-polar molecules can diffuse through the bilayer it separates the inside of the virus from the environment it consists of proteins in a fluid of lipid molecules it consists of two layers of phospholipids