試題詳解

45. Which of the following is true about the distribution of phospholipids on cell membranes?
(A) Under normal physiological conditions, the lateral diffusion rate of phospholipids in the cell membrane is approximately several nanometers per second.
(B) Compared with lateral movement, the transverse movement of phospholipids between the inner and outer leaflets of the cell membrane is much faster.
(C) Floppase can actively transport amphiphilic lipids from the inner leaflet to the outer leaflet.
(D) When phosphatidylserine is found in the outer leaflet, scramblase uses the energy of ATP to move it to the inner leaflet.
(E) The distribution ratio of phosphatidylserine in the inner and outer leaflets of the cell membrane is approximately the same.