Who proposed the concept of the unit membrane for the tripartite structure?

Monovalent ions (e.g.,$Na^+, K^+$) $A$ the membrane permeability,while divalent ions $B$ the same. Complete the given statement by filling in the appropriate option for ($A$ and $B$).

Which is the most widely accepted model to explain the structure of the cell membrane?

Structure and function are correlatable in living organisms. Can you justify this by taking the plasma membrane as an example?

What kind of pores are created by specific types of proteins embedded across the cell membrane?

Which of the following is $NOT$ associated with peripheral proteins?