Question

According to widely accepted "Fluid mosaic model", the cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

• A. Proteins can also undergo flip -flop movements in the lipid bilayer
• B. Many proteins remain completely embeded within the lipid bilayer
• C. Proteins in cell membranes can travel within the lipid bilayer
• D. Proteins can remain confined within certain domains of the membranes

Answer 1

The correct option is A Proteins can also undergo flip -flop movements in the lipid bilayer

The proteins in the lipid bilayer cannot undergo flip-flop movements, thus this is the right answer. All the things in the other options do occur in the lipid bilayer.