Question

Complete the following statement.
In Robertson's model of plasma membrane

• A. Only outer layer is opaque.
• B. Only inner layer opaque.
• C. Middle layer is transparent.
• D. Inner layer is transparent.

Answer 1

Answer: (C)

Middle layer is transparent.

Robertson proposed the Unit membrane concept model of plasmalemma. According to this model, plasma membrane has a trilaminar structure in which transparent lipid bilayer is surrounded on either side by dense proteins with a difference in type for the outer and inner side. Thus, the correct answer is option C.