更多"Almost overnight, Ames became a her"的相关试题:
[单项选择]Ames试验的指示生物为
A. 鼠伤寒沙门菌的野生型菌株
B. 鼠伤寒沙门菌的组氨酸突变型菌株
C. 鼠伤寒沙门菌的色氨酸突变型菌株
D. 大肠杆菌的野生型菌株
E. 大肠杆菌的色氨酸突变型菌株
[单项选择]Ames试验的遗传学终点为
A. DNA完整性改变
B. DNA交换或重排
C. DNA碱基序列改变
D. 染色体完整性改变
E. 染色体分离改变
[单项选择]Ames试验中TA97菌株用于检测
A. 移码突变
B. 碱基置换
C. 非整倍体
D. DNA大段损伤
E. 平衡易位
[单项选择]Ames试验常选用的指示生物为
A. 鼠伤寒沙门菌的野生型菌株
B. 鼠伤寒沙门菌的组氨酸突变型菌株
C. 鼠伤寒沙门菌的色氨酸突变型菌株
D. 大肠杆菌的野生型菌株
E. 大肠杆菌的色氨酸突变型菌株
[单项选择]Ames试验所应用的体外活化系统 S9混合液中最重要的组分是
A. KCl、MgCl2
B. 辅酶Ⅱ
C. 葡萄糖-6-磷酸
D. PBS
E. MFO
[单项选择]若该化合物在Ames试验和微核试验中呈阳性结果，则该化合物可能为
A. 遗传毒性致癌物
B. 促癌物
C. 细胞毒物
D. 暂未确定遗传毒性致癌物
E. 免疫抑制剂
[单项选择]Photojournalist Margaret White became famous for her {{U}}coverage{{/U}} of significant events during the Second World War.
A. baggage
B. orphanage
C. reportage
D. usage
[单项选择]Bicycles became a practical form of transportation ______ people moved from the countryside to cities.
A. before
B. when
C. as soon as
D. after
[单项选择]Ames试验用菌株除了组氨酸突变外，还有一些附加突变，其目的是
A. 增加菌株的抗药性
B. 增加菌株储存过程中的稳定性
C. 提高对致突变物的敏感性
D. 增加细菌的生长速度
E. 抑制细菌的自发回变
[单项选择]He became quite overbearing and domineering once he had become accustomed to the ______ shown to soldiers by the natives. He enjoyed his new sense of power.
A. ability
B. domesticity
C. deference
D. insolence
[单项选择]Sally Ride became interested in the space program ______.
[单项选择]Her desire for anonymity soon became apparent when she refused to answer questions about her identity.
A. recognition
B. concealment
C. vanity
D. success
[单项选择]The passage indicates that women became active in politics chiefly in order to ______.
A. get elected to political offices
B. improve the working conditions and living condition
C. support Jane Adams and her organization
D. revise the Constitution
[单项选择]Hotels became less popular because they usually did not have ______.
A. large enough rooms for big families
B. place for cars to park in
C. sufficient ground rooms
D. quiet and convenient units
[单项选择]
The hotel manager became suspicious of those people who were loitering in the lobby.（）
A. bustling
B. chatting
C. meddling
D. loafing
[单项选择]Gallup became a household name overnight because ______.
A. his performance in 1936 pre-election poll was excellent
B. he was the prophet of the moment
C. he founded a new scientific method of prediction
D. he was the founder of the Gallup Poll
