All the following processes occur rapidly in the membrane lipid bilayer except
(A) Flexing of fatty acyl chains
(B) Lateral diffusion of phospholipids
(C) Transbilayer diffusion of phopholipids
(D) Rotation of phospholipids around their long axes
The correct answer is (C) Transbilayer diffusion of phospholipids.
Here’s why:
– (A) Flexing of fatty acyl chains: This occurs rapidly due to the fluid nature of the lipid bilayer, allowing for constant motion and flexibility.
– (B) Lateral diffusion of phospholipids: Phospholipids can move laterally within the bilayer quickly, allowing for rapid changes in membrane composition and structure.
– (D) Rotation of phospholipids around their long axes: This also occurs rapidly, enabling phospholipids to change their orientation and position within the bilayer.