皮皮学，免费搜题
登录
搜题
【简答题】
继哺乳动物乳腺生物反应器研究成功后，膀胱生物反应器的研究也取得了一定的进展。最近，科学家培育出了一种转基因，其膀胱上皮细胞可以合成人的生长激素并分泌到尿液中。请回答： (1)将人的生长激素基因导入受体细胞，常用的方法是___________。 (2)进行基因转移时，通常要将外源基因转入_________中，原因是_________。 (3)通常采用_________技术检测外源基因是否插入了的基因组中。 (4)在研制膀胱生物反应器时，应使外源基因在的_________细胞中特异性表达。 (5)为使外源基因在后代长期保持，可将转基因体细胞的_________转入________细胞中构成重组细胞，使其发育成与供体具有相同性状的个体。该技术称为__________。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Black broke his leg. He has just had _____X-ray examination .______ doctor said he needed ______ operation.
A.
a, The, an
B.
a, A, an
C.
an, A, an
D.
an, The, an
【单选题】It is the first time that he ______ here and now it is high time that he ______ around.
A.
come; should be shown
B.
has come; was shown
C.
came; was shown
D.
has come; be shown
【单选题】It is the first time he ________ here and now it is high time that he ________ around．
A.
come；should be showed
B.
has come；was showed
C.
has come；be showed
D.
came；was showed
【简答题】为什么说现在的手机也可以归类于多媒体终端?请举例说明。
【单选题】—He has few friends, ________? —________. So he feels lonely from time to time. [ ]
A.
hasn't he; Yes, he does.
B.
does he; No, he doesn't.
C.
doesn't he; No, he doesn't.
D.
has he; Yes, he does.
相关题目：