问答题

下面哪几种酶的基因突变可导致半乳糖血症：

A.延胡索酸酰乙酰乙酸水解酶
B．尿苷二磷酸半乳糖-4-表异构酶
C．胱硫醚合成酶
D．半乳糖激酶1
E．对羟苯基丙酮酸双氧化酶

你可能感兴趣的试题

单项选择题

第一节
听下面5段对话。每段对话后有一道小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
听力原文：W: I'm afraid I have to call a taxi to go to the airport, for it's rather difficult for a bus to move during the rush hour.
M: But I don't think that would do any good. I will drive you there by motor.
How will the woman go to the airport?
A．By bus.
B．By taxi.
C．By motor.

A.
M:
B.
How
C.By
D.
B．By
E.
C．By
F.

单项选择题

听力原文：W: Would you mind turning down the TV a bit?
M: Why?
W: I'm answering the phone.
M: OK. I will do it.
What's the woman doing?
A．She is watching TV.
B．She is telephoning.
C．She is turning the television down.

A.
M:
B.
What's
C.She
D.
B．She
E.
C．She
F.