學士後西醫-生物學題庫 下載題庫

57. About cell membrane, which of the following statements is NOT TRUE?
(A) Cell membranes are fluid mosaics of lipid and proteins, and the phospholipid bilayer is the basic building block of the membrane.
(B) Most of the phospholipids can shift about laterally in the plane of the membrane, but it is quite rare for phospholipids to flip-flop transversely across the membrane because the hydrophilic part of the molecule must cross the hydrophobic interior of the membrane.
(C) Phospholipids with saturated hydrocarbon tail pack more tightly, therefore decreasing membrane fluidity and viscosity.
(D) The presence of unsaturated hydrocarbon tails in phospholipids can enhance membrane fluidity, because unsaturated hydrocarbon tails cannot pack together as closely as saturated carbon tails.
(E) The steroid cholesterol in the plasma membrane of animal cells can change membrane fluidity and this effect is temperature-dependent.

學士後西醫-生物學- 102 年 - 102 學士後西醫：普通生物學#27058

答案：登入後觀看
難度： 適中

討論
私人筆記( 0 )

kevin11001047 小二下 (2019/02/17)

Phospholipids with saturated hydrocarbon tail pack more tightly, therefore decreasing membrane fluidity but increase the viscosity.

檢舉

你可以購買他人私人筆記。