皮皮学，免费搜题
登录
搜题
【单选题】
在乳糖操纵子表达调控中乳糖生成的半乳糖的作用是( )A．作为阻遏物结合于操纵基因B．抑制阻遏物基A.
在乳糖操纵子表达调控中乳糖生成的半乳糖的作用是( ) A.作为阻遏物结合于操纵基因
B.
抑制阻遏物基因的转录
C.
使阻遏物失去结合DNA的能力
D.
作为辅阻遏物结合阻遏物
E.
增强RNA聚合酶转录活性
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
【简答题】教材P97第二题
【单选题】Jack admitted that he ought not to have taken away the book, ______ ?
A.
oughtn't he
B.
ought he
C.
did he
D.
didn't he
【单选题】—Jack is always studying hard and does well in all subjects. —No wonder he ________ to be admitted to Beijing University.
A.
is expecting
B.
will be expected
C.
is expected
D.
will expect
【简答题】I 重点句式 1 、 I ______________ because I want you to live ____________________________ I have. 真希望你能那样做,因为我盼着你也能像我一样长寿健康。 (1) do hope“ 的确希望”, do 用来强调谓语动词 hope 。 ❶ 在一般句型中, do (does, did) 常用来 强调谓语动 词的语气,在句...
【单选题】Jack admitted that he ought not to have made his mother angry, ______?
A.
oughtn't he
B.
wasn't he
C.
didn't he
D.
hadn't he
【简答题】俄罗斯人不喜欢的颜色是（）
【单选题】He required that Jack ______ admitted to hospital immediately.
A.
was
B.
be
C.
being
D.
been
相关题目：