A:married; got married
B:have married; got married
C:have married with; were married
D:got married; were married
下列是生物学技术制备抗体的两个途径模式简图.
(1)过程①和②得到的Y细胞称为____ .得到的单克隆抗体最主要的优点是____ .
(2)抗体1与抗体2的氨基酸排列顺序相同,两者的空间结构是否相同?____ .为什么?____
(3)在基因表达载体中,启动子的作用是____ 识别和结合的部位,驱动V1基因的____
(4)质粒上的标记基因的作用是____ .
(5)过程④要用到的主要酶是____
物质
甲
乙
丙
丁
反应前质量/g
3
8
5
4
反应后质量/g
7
2
6
下列说法正确的是( )
— Would you like to go for a picnic to enjoy the fresh air outside this weekend? — __________. It will be a sunny day.