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Cavendish LaboratoryThe Cavendish Laboratory has had an important influence on biology, mainly through the application of X-ray crystallography to the study of structures of biological molecules. Francis Crick already worked in the Medical Research Council Unit, headed by Max Perutzand housed in the Cavendish Laboratory, when James Watson came from the United States and they made a breakthrough in discovering the structure of DNA. For their work while in the Cavendish Laboratory, they were jointly awarded the Nobel Prize in Physiology or Medicine in 1962, together with Maurice Wilkins of King's College London, himself a graduate of St. John's College, Cambridge.The discovery was made on 28 February 1953; the first Watson/Crick paper appeared in Nature on 25 April 1953. Sir Lawrence Bragg, the director of the Cavendish Laboratory, where Watson and Crick worked, gave a talk at Guy's Hospital Medical School in London on Thursday 14 May 1953 which resulted in an article by Ritchie Calder in the News Chronicle of London, on Friday 15 May 1953, entitled "Why You Are You. Nearer Secret of Life." The news reached readers of The New York Times the next day; Victor K. McElheny, in researching his biography, Watson and DNA: Making a Scientific Revolution, found a clipping of a six-paragraph New York Times article written from London and dated 16 May 1953 with the headline "Form of `Life Unit' in Cell Is Scanned." The article ran in an early edition and was then pulled to make space for news deemed more important. (The New York Times subsequently ran a longer article on 12 June 1953). The Cambridge University undergraduate newspaper Varsity also ran its own short article on the discovery on Saturday 30 May 1953. Bragg's original announcement of the discovery at a Solvay Conference on proteins in Belgium on 8 April 1953 went unreported by the British press.Sydney Brenner, Jack Dunitz, Dorothy Hodgkin, Leslie Orgel, and Beryl M. Oughton, were some of the first people in April 1953 to see the model of the structure of DNA, constructed by Crick and Watson; at the time they were working at the University of Oxford's Chemistry Department. All were impressed by the new DNA model, especially Brenner who subsequently worked with Crick at Cambridge in the Cavendish Laboratory and the new Laboratory of Molecular Biology. According to the late Dr. Beryl Oughton, later Rimmer, they all travelled together in two cars once Dorothy Hodgkin announced to them that they were off to Cambridge to see the model of the structure of DNA. Orgel also later worked with Crick at the Salk Institute for Biological Studies.9. Which one in the following is TRUE according tothe passage?
A.
Bragg's announcement of the discovery on proteins went reported by the Japanese press.
B.
The Cavendish Laboratory has had an important influence on biology.
C.
Crick was not impressed by the new DNA model.
D.
Dorothy Hodgkin was the third one to see the model of the structure of DNA.
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【单选题】如果把地球的历史浓缩为1个小时,至最后15分钟时,多细胞生物方才出现。在还剩下4分钟的时候,陆地上才开始闪现爬行动物的身影,而当第58分钟到来时,一切大局已定。这段话意在表明( )
A.
地球的历史可以浓缩
B.
地球生命的历史很长
C.
地球生命出现的时间是相当晚的
D.
地球的历史如一个小时一样短暂
【单选题】关于尿失禁,下列说法错误的是( )
A.
尿失禁是老年人中最为常见的健康问题
B.
老年女性的发病率低于男性
C.
尿失禁可以诱发心里问题
D.
尿失禁严重影响生活质量者可采用手术治疗
【判断题】航空公司一般不接受货运代理人关于“危险货物”的间接运输。(    )
A.
正确
B.
错误
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A.
地球的历史很长
B.
地球生命的历史很长
C.
地球生命出现的时间是相当晚的
D.
地球的历史如一个小时一样短暂
【单选题】播放PPT时若要从当前位置放映,可按组合键“?”( )
A.
Shift+F4
B.
Shift+F5
C.
Shift+F6
D.
Shift+F7
【单选题】胞质内有大量异染性颗粒的细胞是
A.
成纤维细胞
B.
浆细胞
C.
肥大细胞
D.
巨噬细胞
E.
脂肪细胞
【简答题】系统结构图示于图3。已知M=10、h=1,试判断系统是否存在自振,若有自振,求出自振振幅及频率。 图3 具有滞环继电特性的非线性系统
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A.
100
B.
150
C.
200
【单选题】细胞内有大量异染性颗粒的是__
A.
浆细胞
B.
成纤维细胞
C.
肥大细胞
D.
巨噬细胞
E.
间充质细胞
【单选题】尿失禁发病者以()为主
A.
儿童
B.
青少年
C.
老年人
D.
中年人
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