【题目】(9分)某研究性学习小组欲研究细胞膜的结构和成分,如果你是课题组成员,请你设计一个简易实验制备较纯净的细胞膜,并对其成分进行鉴定。
A.制备较纯净的细胞膜
(1)用蒸馏水处理红细胞溶血后,流出细胞外的物质主要应该是________________________,这种物质的特性是________________________,因而使红细胞具有________________________的功能。
(2)用________________________进行多次冲洗,即可获得较纯净的细胞膜。
B.对细胞膜的成分进行鉴定
(3)在制得的膜成分中加入双缩脲试剂,如果产生________________________反应,即可证明细胞膜成分中含有________________________。
(4)研究发现,脂溶性物质容易透过细胞膜,非脂溶性物质透过细胞膜十分困难,这表明组成细胞膜的主要成分中有________________________。
(5)该实验表明,组成细胞膜的主要成分有____________________________________。
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