现代生物技术和应用 干扰素是治疗癌症的重要物质,人血液中只能

代生物技术和应用

干扰素是治疗癌症的重要物质,人血液中只能提取微量的干扰素,因而价格昂贵。利用生物工程可获得价格低廉、药性一样的干扰素。

55.直接从人的淋巴细胞提取能指导干扰素合成的________________,并使之与质粒的DNA结合。

56.上图是形成重组质粒的操作过程。其中工具AC名称分别是______________

57.下图表示切割基因分子的过程,图中可知,该酶能识别的碱基序列和切点是

ACTTAAG,切点在CT之间

BCTTAAG,切点在GA之间

CGAATTC,切点在GA之间

DGAATTC,切点在CT之间

答案

55 目的基因

56 限制酶 DNA连接酶

57 C

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