当前位置:首页 > 问题分类 > 学历类考试 > 考研 > 问题详情

问题:

N5,N10-CH2-FH4主要来源于 A.His B.Trp C.Ser D.Gly

N5,N10-CH2-FH4主要来源于

A.His

B.Trp

C.Ser

D.Gly


  参考答案

正确答案:AB

134.答案:CD

[考点] 一碳单位代谢

[分析] Ser(丝氨酸)Gly(甘氨酸)能提供N5N10-CH2-FH4。所以应选CD

His(组氨酸)提供亚氨甲基(-CHNH)

Trp(色氨酸)提供的是甲酰基(-CHO)

相关题目:

The copyboy's duties may sometimes include ______.
A. running errands for staff reporters
B. writing small news stories
C. reporting campus and student news
D. both A and B
A cub reporter is another name for a ______.
A. copyboy
B. campus reporter
C. newspaper editor
D. beginning reporter
Passage Two
The student who wants a newspaper career has much hard work ahead of him before he can ecome even a cub, or beginning reporter. He may begin by working on his high school ewspaper or yearbook.
Then the aspiring (有志的) reporter may break into newspaper work as a copyboy, running rrands and helping sta. ff reporters. He may even be given a chance to write small stories. ometimes students who are interested in news reporting can get jobs as campus reporters for ocal newspapers.
Jobs such as these serve to acquaint the beginner with the atmosphere of newsgathering.They give him a chance to sharpen his eye for details and teach him to be sure that his facts are accurate, that he reports them correctly, and that he writes his articles clearly. This work may lead to a job as a cub reporter on a newspaper, the important first step toward a career in news reporting.
36. The best title for this passage is ______.
A. The Work of a Newspaper Reporter
B. Reporting News from the Campus
C. Getting Started as a Reporter
D. What a Copyboy Does