问题
问答题
The basic structure of biological membranes is determined by the lipid bilayer, but their specific functions are carried out largely by proteins. Explain your answer.
答案
参考答案：
脂双层决定了膜结构, 并提供了渗透性的障碍, 使得细胞内外两侧隔离。特异的膜蛋白允许特异的溶质进出膜、结合信号分子、介导细胞外基质的附着。