本题目来源于试卷: Form and Function B.3 Membranes & Membrane Transport，类别为 IB生物学
[单选题]
Which of the following is not a function of )q-vus76igsxg bd9u+a,eg v (cholesvmh+34sn9jt9zu hc.i)frb q (terol in cell membranes?
A. It reduces membrane fluidity by restricting the movement of phospholipids.
B. It increases membrane flexibility.
C. It serves as a transport channel.
D. It reduces membrane's the permeability to hydrophilic substances.
参考答案: C
本题详细解析:
Cholesterol is a steroid, not a transport channel. Reducing membrane fluidity (Choice A), increasing membrane flexibility (Choice B), and reducing permeability to hydrophilic substances (Choice D) are all roles of cholesterol in cell membranes.
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