Phospholipids can move from one layer to the other in a cell membrane bilayer by
A)lateral diffusion.
B)biosynthesis.
C)flippases and floppases.
D)increased diffusion.

Question

Quizplus · Accepted Answer

Phospholipids can move from one layer to the other in a cell membrane bilayer by flippases and floppases, which are enzymes that catalyze the translocation of phospholipids across the membrane. Lateral diffusion (A) refers to the movement of phospholipids within a single layer of the bilayer. Biosynthesis (B) refers to the creation of new phospholipids, but does not explain how they move between layers. Increased diffusion (D) is not a mechanism for phospholipid movement between layers.

Phospholipids Can Move from One Layer to the Other in a Cell