[简答题]Eukaryotic repressors抑制因子work invarious ways, just as they do in bacteria However, the simplest and most common mechamsm seen in bacteria is for the repressor to bind to a site overlapping the promoter, thus blocking binding RNA polymerase. That mechanism is not typically seen in eukaryotes. Most commonly, cukaryotic repressors work by recruiting(招募)histone modifiers that reduce transcription. For example, where as a histone acetylase(乙酰比酶)is typicallyassociated with activation, a histone deacetylase (去乙酰化梅)——that is，anenzyme that removes acetyl groups——acts to repress a gene. In some cases, long stretches of nucleosomal DNA can be kept in a relatively insert(无活性)state by appropriate nucleosome modification, most notably decetylation and methylation.

[单项选择]组织因子途径抑制因子
A. 参与止血过程
B. 参与凝血过程
C. 参与纤溶激活过程
D. 参与纤溶抑制过程
E. 参与抗凝过程

[单项选择]纤溶酶原激活物抑制因子
A. 参与止血过程
B. 参与凝血过程
C. 参与纤溶激活过程
D. 参与纤溶抑制过程
E. 参与抗凝过程

[单项选择]体液补体抑制因子是（）
A. Clq
B. IgGl
C. IL-2
D. H因子
E. B因子

[单项选择](76~80题共用备选答案) 组织因子途径抑制因子
A. 参与止血过程
B. 参与凝集过程
C. 参与纤溶激活过程
D. 参与纤溶抑制过程
E. 参与抗凝过程

[单项选择]人体内主要的造血抑制因子是 （）
A. SCF
B. G-CSF
C. Ils
D. M-CSF
E. TGF8

[单项选择](76~80题共用备选答案) 纤溶酶原激活物抑制因子
A. 参与止血过程
B. 参与凝集过程
C. 参与纤溶激活过程
D. 参与纤溶抑制过程
E. 参与抗凝过程

[填空题]纤溶酶原激活物抑制因子参与纤溶________过程。

[判断题]大豆中含有的胰蛋白酶抑制因子能抑制蛋白酶的活性，从而影响人体对蛋白质的消化吸收。( )

[填空题]UN is trying to work out ways to prevent HIV/ AIDS transmission from mother to child.

[单项选择]直接抑制凝血因子X的药物是（）
A. 肝素
B. 华法林
C. 达比加群酯
D. 尿激酶
E. 阿哌沙班

[填空题]（）不能直接抑制凝血因子Xa。

[多项选择]组织因子途径抑制物（TFPI）抑制的凝血因子主要有（）。
A. 因子Ⅶa
B. 因子Ⅷa
C. 因子Ⅱa
D. 因子Ⅹa
E. 因子Va

[填空题]

The Drugs Don’t Work

A．Just last month, the U.S. Centers for Disease Control and Prevention released a stunning report on the impact of resistant bacteria. According to the analysis, which CDC officials said was conservative, more than 2 million people are infected in the United States each year by bacteria that are resistant to a wide array of the safest and most effective antibiotics. Of those, at least 23,000 die. The illnesses and deaths cost society some ＄55 billion annually-S20 billion from additional health-care spending and ＄35 billion from lost productivity. "If we are not careful, we will soon be in a post-antibiotic era," said Dr. Tom Frieden, the director of the CDC. "And for some patients and for some microbes, we are already there."
B．Resistant bacteria spread not only with cross-contamination from people who are already sick or unknowingly carrying the microbes; they also come from food Americans eat. Indeed, a cur

[多项选择]·The company you work for has just installed a new computer system, but there is a problem with some of the equipment.
·Write an email to all staff in your department:
·explaining what the problem is
·telling staff what to do if they have this problem
·saying when the problem will be fixed.
·Write 40-50 words.
·Write on the opposite page.