问题 问答题 简答题

酶有何特性?何谓酶工程?

答案

参考答案:

特性:专一性强,催化效率高;

酶工程:利用酶、细胞器或细胞所具有的特异催化功能,对酶进行修饰改造,并借助生物反应器和工艺过程来生产人类所需产品的一项技术。

完形填空

第二卷(共35分)

第四部分:写(共两节,满分35分)

第一节:对话填空(共10小题;每小题1分,满分10分)

A: Have you ever read some reports about UFOs?

B: Of course. I have a firm b      76      in UFOs. I’m    76.             

always interested in the stories and aliens.

A: What are they like?

B: According to some w      77      , it is colorless       77.             

and moves at an a      78      speed with little noise.  78.             

Aliens are said to be white-skinned, strange-looking

visitors from o     79       space.                      79.             

A: I don’t quite agree with you d     80       to space    80.             

exploration, most important planets have been examined,

p     81       have been taken and samples have          81.             

collected there, but no e     82       of life has       82.             

been discovered.

B: So you mean UFOs don’t e     83       ? There are no    83.             

aliens? How would you explain some people’s sudden

d      84      ? Many people have reported seeing        84.             

aliens.

A: It’s hard to say. We will still continue with

scientific r     85       .                              85.             

单项选择题