See also. 1  Concept inventory. 2  Constructive alignment. 3  Educational assessment. 4  Ipsative assessment. 5  Norm-referenced assessment. 6  Psychometrics. 7  Standardized test.
Enveloped viruses have a lipid-based membrane surrounding the protein capsid. This envelope is partly composed of the cell membrane within which the virus replicated, and it contains proteins and carbohydrates. Some of the proteins are from the host cell and some are from the virus..
--   The plasma membrane is the membrane surrounding a cell that separates the cell from its external environment - responsible for barrier function; consists of a phospholipid bilayer (polar head group, nonpolar tails) and associated membrane lipids and proteins (integral-help transport hydrophilic molecules across bilayer, peripheral, and ...