The plasma membrane serves many functions, many of which depend on the presence of specialized membrane proteins. What roles of the plasma membrane could still occur if the bilayer were lacking these proteins?

i think its the first one

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive

answercoenzymes;