Question

Keeping in view the “fluid mosaic model” for the structure of cell membrane, which one of the following statements is correct w.r.t. the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?

• A. Neither lipids nor proteins can flip-flop
• B. Both lipids and proteins can flip-flop
• C. While lipids can rarely flip-flop, proteins cannot
• D. While proteins can flip-flop, lipids cannot

Answer 1

The correct option is C While lipids can rarely flip-flop, proteins cannot

Lipids can flip-flop, they do so slowly with the help of protein called Flippases. But protein do not flip-flop.