helix n. 1.螺旋结构 Helix 大蜗牛 nickase(DNA) 【化】 切口酶 Structure n. 结构,构成;建筑物 vt. 设计,组织 structure n. 1.[U,C]结构;构造;组织 2.[C]构造体;建筑物 v. [T] 1.构造;组织;建造 DNA polymerase 【化】 DNA聚合酶 double a. 1.加倍的;两倍的 2.特大的;特强的 3...
On the other hand, the AATT segments in oligonucleotide double helices tend to be propeller twisted, and the AT domains conform to a structure similar to that of Levitt and Dickerson models. These studies indicate that under solution conditions the DNA double helix, depending upon sequence, can...
C。解析:沃森和克里克发现DNA的双螺旋结构主要是基于分析其他科学家的数据以及他们自己的研究。选项A仅他们自己的实验室实验不准确,因为也参考了别人的数据;选项B仅理论计算不全面;选项D纯靠运气是错误的。本题考查对科学发现过程的理解,词汇有“double - helix(双螺旋)”“discovery(发现)”,语法为一般过去时的被动...
5. Franklin, R. Notes for Colloquium on Molecular Structure, November 1951. Franklin Papers FRKN 3/2, Churchill College Cambridge, UK. 6. Franklin, R. & Gosling, R. Joke death notice for the DNA helix, 1952. Wilkins Papers K/PP178/2/26, King’s College London. 7. Crick, F. Lette...
4. Franklin, R. Notes for Colloquium on Molecular Structure, November 1951. Franklin Papers FRKN 3/2, Churchill College Cambridge, UK.5. Watson, J. D. The Double Helix Ch. 23 (Atheneum, 1968).6. Cowan, P. Letter to F. Crick, January 1953. Crick Papers Box 2, Folder 11, ...
5. Franklin, R. Notes for Colloquium on Molecular Structure, November 1951. Franklin Papers FRKN 3/2, Churchill College Cambridge, UK. 6. Franklin, R. & Gosling, R. Joke death notice for the DNA helix, 1952. Wilkins Papers K/PP178/2/26, King’s College London. ...
In biology, "double helix" is a term used to describe the structure ofDNA. A DNA double helix consists of two spiral chains of deoxyribonucleic acid. The shape is similar to that of a spiral staircase. DNA is anucleic acidcomposed of nitrogenous bases (adenine, cytosine, guanine, and thymi...
Watson 和 Crick 在前人的基础上,提出了DNA双螺旋结构 (double helix structure)的模型。 1. DNA由两条多聚脱氧核苷酸链组成 •构成DNA的两条多聚脱氧核苷酸链围绕着同一个螺旋轴形成右手螺旋的结构。 •两条多聚核苷酸链在空间的走向呈反向平行(anti-parallel)。
James D. Watson (詹姆斯 •D.沃森)《The Double Helix》《双螺旋》解析 目录 James D. Watson (...
之后,与她同在伦敦国王学院的威尔金斯在没有经过富兰克林同意的情况下,将51号照片和其他数据发给了沃森和克里克,这直接促成他们迅速确认了DNA的双螺旋结构。在1968年出版的《双螺旋》(The Double Helix)一书中,沃森也有着这样的描述:“看到照片的瞬间,我目瞪口呆,心跳加速。”...