【单选题】下列关于生物膜结构探索历程的说法,不正确的是 [ ]
A.
最初通过对现象的推理分析得出细胞膜是由脂质组成的
C.
流动镶嵌模型认为构成生物膜的磷脂分子和大多数蛋白质分子可以运动
D.
三层结构模型和流动镶嵌模型都认为蛋白质分子在膜中的分布是不均匀的
【单选题】下列关于生物膜发现史的叙述,不正确的是 [ ]
B.
荷兰科学家用丙酮从人的红细胞中提取脂质,在空气一水界面上铺展成单分子层面积为红细胞表面积的2倍。他们由此推出,细胞膜中的脂质分子必然排列为连续的两层
C.
罗伯特森在电镜下看到细胞膜都是由磷脂-蛋白质-磷脂三层结构构成的
D.
科学家将不同荧光染料标记的人细胞和鼠细胞进行融合,证明了细胞膜的流动性
【简答题】You may give a cold shoulder to a friend who has not kept a 18 he made to you. Or, to someone who has lied about you to others.
【简答题】You have a friend who is about to enter university. He wants you to advise him which subject to specialize in, history , in which he is very interested, or computer science, which offers better job op...
【简答题】Suppose you have a friend who is about to enter university, and he wants you to advise him on which subject to specialize in—history, in which he is very interested, or computer science, which offers ...
【简答题】滴定液是与被测组分反应、准确浓度已知的试剂溶液,其浓度用____ 、____和____表示。