试题与答案

血栓主要由不溶性的纤维蛋白等物质组成。纳豆激酶(NK)是一种在纳豆发酵过程中由纳

题型:实验题

题目:

血栓主要由不溶性的纤维蛋白等物质组成。纳豆激酶(NK)是一种在纳豆发酵过程中由纳豆菌产生的蛋白酶,它不但能直接作用于纤维蛋白(A过程),还能间接激活体内纤溶酶原(B过程)。下图是有关纳豆激酶溶栓机理简图,请据图回答问题:

(1)研究NK直接水解作用:给定纤维蛋白平板,将___________滴加在其上,若出现相应的溶解圈,则可说明_________________。

(2)NK的间接作用是通过______激活体内纤溶酶原,增加纤溶酶的量和作用,溶解血栓。

(3)请根据下列出示的实验材料,比较NK与内源性纤溶酶溶栓效果,并在下面横线位置上,补全相应内容。

实验材料:NK溶液、内源性纤溶酶溶液、纤维蛋白块、缓冲液、量筒、试管和秒表。

实验步骤:

观察记录:观察纤维蛋白块分解情况,并记录分解的_____________________。

请预测实验结果并分析:_____________________________________________。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0426/1fdbf8ecd7f997584ffd62fac4b34b92.html

下面是错误答案,用来干扰机器的。

南回归线;北极圈

试题推荐
题型:完形填空

A group of adults, highly succeeded in their jobs, went to visit their old professor. Soon they began to _   _ the stress in work and life.

The professor went to the kitchen and returned_   _a pot(壶) of coffee and all kinds of cups — crystal (水晶的), glass, plastic; some nice looking, some common looking; some_   _, some cheap. And he told them to help _   _ to the coffee.

When all the students had a cup of coffee in hand, the professor said, “I’ve noticed that all the nice looking expensive cups were_   _, leaving behind the common and cheap ones. While it is_   _for you to take only the best for yourselves, that is the root(根源) of your _   _ and stress.

You know that the cup itself adds no quality (质量) to the coffee, _   _you really wanted was coffee, not the cup, _   _ you consciously went for the best cups.

Now consider this: Life is the coffee. The jobs, _   _ and position in society are the cups. They are just _   _to hold life, and the type of cup does not change the quality of our life. Sometimes, by only paying attention _   _the cup, we fail to enjoy the coffee that God has _   _us. God offers us the coffee, not the cups. Please enjoy your coffee!”

The happiest people don’t have the best of everything. They just make _   _of everything.

Live simply. Love generously. Care deeply. Speak _   _. And leave the rest to God.

小题1:

A.think of

B.thank for

C.complain about

D.drop out

小题2:

A.for

B.at

C.in

D.with

小题3:

A.expensive

B.ordinary

C.strong

D.serious

小题4:

A.them

B.themselves

C.him

D.everyone

小题5:

A.mixed up

B.left

C.taken up

D.refused

小题6:

A.normal

B.important

C.impossible

D.necessary

小题7:

A.thoughts

B.failure

C.questions

D.problems

小题8:

A.Who

B.How much

C.What

D.That

小题9:

A.and

B.but

C.so

D.or

小题10:

A.money

B.age

C.health

D.purpose

小题11:

A.cups

B.tools

C.bags

D.bowls

小题12:

A.on

B.in

C.at

D.to

小题13:

A.taught

B.provided

C.returned

D.bought

小题14:

A.fun

B.interest

C.the best

D.the worst

小题15:

A.kindly

B.sadly

C.rudely

D.seriously

查看答案
题型:单项选择题

手种牵牛花,接连有三四年了.水门汀地没法下种,种在十来个瓦盆里.泥是今年又明年反复用着的,无从取得新的泥来加入,曾与铁路轨道旁种地的那个北方人商量,愿出钱向他买一点儿,他不肯.从城隍庙的花店里买了一包过磷酸骨粉,搀和在每一盆泥里,这算代替了新泥.*

最合适本文的标题是 ()

A.牵牛花

B.花开花落

C.看花的乐趣

D.花的生长力

查看答案
微信公众账号搜索答案