DNA(脱氧核糖核酸)的二级结构通常有两种主要类型: 1. 双螺旋结构(Double Helix Structure) •B型双螺旋结构: 这是 DNA 最常见的二级结构类型。B型双螺旋结构具有两条螺旋状的 DNA 链,它们以螺旋形式缠绕在一起,形成了一种类似梯子的结构。每个碱基对都由一个嘌呤和一个嘧啶组成,通过氢键相互配对(A对T,C对G...
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.双人的 4.成双的;重复...
但Franklin认为B form is an artefact of being water-logged, 她不认为B form能代表DNA,所以在1952年底-1953年初,她对“DNA本质上是螺旋结构”持否定态度。 Franklin虽然没搞懂A form的structure, 但是她仔细分析了A form的数据,并揭示了它具有C2-symmetry. 但Franklin此时并没有意识到C2 symmetry具有非常重要的i...
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...
DNA Structure Discovery Dr. Francis Crick and Dr. James Watson at a Molecular Biology Symposium.Ted Spiegel / Contributor / Getty Images Credit for the discovery of the double-helical structure of DNA has been given to James Watson andFrancis Crick, awarded a Nobel Prize for their work. Determ...
1) DNA double helix structure DNA双螺旋结构1. To philosophical think for between correlativity of the theory of warp of space time offered by Einstein and biological DNA double helix structure . 对爱因斯坦的“弯曲时空”理论与生物体DNA双螺旋结构的相关性进行了哲理性思考控制生命时间程序的生物钟...
卫生状况俨然与疾病有关,全球大气相通,地震射电产生旋风,又使病毒在空气中发生迁移进行传播,地震射电产生等离子体在地球磁场洛伦兹力作用下发生共轭涡旋运动是形成生物蛋白双螺旋DNA的原因,也是生物变异的原因,在《地震气象量子力学导论》一文中有详细论述。近期太阳北回,发生多次陆地地震,导致空间环境射电指数极强,静电强...
2003 is the 50th anniversary of the discovery of the double helix structure of DNA. Its discoverers, James Watson, Francis Crick and Maurice Wilkins, won the Nobel Prize for Physiology and Medicine in 1962 for their discovery. [2011 update:this online version has been updated with animations ...
exists mainly in the nucleus and mitochondria of each cell in an organism. It consists of two long strands linked together in a structure resembling a ladder twisted into a spiral, called adouble helix.Each rung is made up of two chemical bases, callednucleotides,that are joined together by ...
1. Helix structure(螺旋结构): It refers to the spiral arrangement of the two DNA strands forming a double helix, which is stabilized by hydrogen bonds between nucleotides. 2. Base pair(碱基对): It is a combination of two nucleotides, where adenine (A) always pairs with thymine (T) and ...