试题与答案

利用基因工程生产蛋白质药物,经历了三个发展阶段: 第一阶段,将人的基因转入细菌细

题型:填空题

题目:

利用基因工程生产蛋白质药物,经历了三个发展阶段:

第一阶段,将人的基因转入细菌细胞。

第二阶段,将人的基因转入小鼠等动物细胞。这两个阶段都是进行细胞培养,提取药物。

第三个阶段,将人的基因转入活的动物体内,再饲养这些转基因动物,从动物乳汁或尿液中提取药物。

(1)将人的基因转入异种生物细胞或体内,能够产生药物蛋白的原理是_______。

(2)人类基因能和异种生物的细胞或个体中的基因拼接(整合)在一起,是因为它们的DNA分子都具有____结构,都是由4种_____构成的,基因中碱基都能够_____。

(3)人的基因在异种生物的细胞中表达成蛋白质时,需要经过______和______两个步骤。第一步的模板是____,原料是_____提供的_____;第三步的模板是______,原料是_____。“搬运工”及“装配工”是:______,在异种生物细胞中的______上合成药物蛋白。

(4)利用转基因牛、羊的乳汁可以提取药物,甚至可以直接用于治病,因为其乳汁中含有_______。

答案:

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A.stoppedB.orderedC.encouragedD.agreed
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