脱氧核糖核酸分子是由许多更小的分子组成的。
采集了一份常规的脱氧核糖核酸样本。
脱氧核糖核酸带有决定有机体形成方式的遗传型板。
DNA carries the genetic blueprint which tells any organism how to build itself.
中国海关开始对所有入境点的入境人员进行核酸检测。
Chinese customs began NAT on inbound arrivals at all points of entry.
用脱氧核糖核酸末端转移酶介导的缺口末端标记技术（TUNEL）检测细胞凋亡。
Terminal deoxynucleotidyl transferase-mediated nick end labeling (TUNEL) technique were applied to deterimine the apoptotic cells.
这样一来，细胞内部发生的使得核酶加速核酸复制速率的任何变化，都会在进化群体中快速扩散。
Thus, any random changes in the interior, fledgling ribozymes that could speed up nucleic acid replication rates will spread rapidly through an evolving population.
另一种被称之为rna的核酸负责将信息传递到名为核糖体的分子机器上，核糖体通过阅读RNA信息，并将氨基酸串联起来形成蛋白质。
Another nucleic acid, RNA, carries the information to a molecular machine called a ribosome, which reads the RNA and strings together amino acids to form the protein.
核糖核酸干扰(RNAi)会攻击恶性组织细胞里的专门基因，让其丧失功能并且最终将其杀死。
RNAi (Ribonucleic acid interference) is a technique that attacks specific genes in malign cells, disabling functions inside and killing them.
脱氧核糖核酸也拥有这种组合系统，你的生物基础或氨基酸数量是有限的，但却能组合出，几乎无限的脱氧核糖核酸螺旋结构。
DNA also has this sort of combinatorial system where you have a finite number of, I guess, bases or amino acids that could combine to a possible infinity of strings of DNA strings.
构成生命体的许多关键分子都有一个特定的导向，或者说是旋向性：脱氧核糖核酸右旋，氨基酸左旋。
Many of the key molecules for life have a specific direction, or handedness: DNA twists to the right, amino acids to the left.
DNA（脱氧核糖核酸）的分子是一种双螺旋结构，酷似一架沿纵向扭曲的梯子。
The DNA molecule is a double helix, resembling a ladder that's been twisted along its length.
例如，通过随机折叠，核糖核酸酶(一种小型蛋白质)的氨基酸链能形成超过1040种不同的结构，单这一种蛋白质就需要数亿年的时间来探索。
For example, by random folding, the amino-acid chain of the enzyme ribonuclease, a small protein, could adopt more than 1040 different shapes, which would take billions of years to explore.
取而代之一种叫做“核酸外切酶”的酶类被附着在AHL的顶部，它从DNA链上劈开各个碱基对，然后把它们填进孔道内，以供一个一个地识别。
Instead an enzyme, called an exonuclease, is attached to the top of the AHL. It cleaves individual base pairs from the DNA strand and feeds them through the pore to be detected one at a time.
科学家认为，女性更健康的原因可能在于微rna(核糖核酸)，它是染色体上RNA编码的短片段。
The reason why women are more robust appears to be microRNAs - short strands of RNA encoded on the chromosome, scientists believe.
他们在使烟草细胞接触锌指核酸酶之外，也添加了可增强抗除草剂特性的基因片段。
When they exposed tobacco cells to the zinc finger nucleases, they also added a version of that gene that enhances herbicide resistance.
早期研究发现小分子核糖核酸还可以促进干细胞的产生。
Early studies suggest that microRNAs can also boost the production of stem cells in culture.
这确实已经相当小了，但可以说还没足够小到能测量出蛋白质分子间的缝隙、或是更靠近地观察DNA(脱氧核糖核酸)分子。
That's pretty small, but not small enough to, say, measure the gaps between proteins or look at a DNA molecule up close.
英国科学家十日开始一项新研究，考虑如何在动物实验中使用人类脱氧核糖核酸，并确定这种引起争议的科学研究，界线可能在哪里。
British scientists begin a new study on Tuesday to consider how human DNA is used in animal experiments and to determine what the boundaries of such controversial science might be.
此外，因为小分子核糖核酸的构造既小又简单，所以可以制造核糖核酸，把它当作研究工具来使用。
Moreover, because microRNAs are so small and simple in structure, they can be manufactured for use as research tools.
哈佛大学的德里克·罗斯进行了相似的研究，他使用合成核糖核酸信使分子模仿病变基因的活动。
Derrick Rossi of Harvard University has performed a similar trick using synthetic RNA messenger molecules to mimic the activity of the genes in question.
其他研究显示，核糖核酸基因调控中起着其他细胞的功能和重要作用。
Other studies revealed that RNA plays a major role in gene regulation and other cellular functions.
世卫组织现在呼吁，在具有明确界定的条件下并且作为结核病和耐多药结核病治疗控制国家计划的部分内容推出全自动核酸扩增试验。
WHO is now calling for the fully automated NAAT to be rolled out under clearly defined conditions and as part of national plans for TB and MDR-TB care and control.
重组酶与核酸酶不同，它剪断基因的双链，然后在断点的周围等候。
Unlike nucleases, recombinases cut a double-stranded piece of DNA and then wait around on the exposed ends.
生命起源研究的许多团体都集中在核糖核酸，它相信已先于活细胞。
Many groups studying the origins of life have focused on RNA, which is believed to have pre-dated living cells.
对分离的基因来说，它可被定义成一组需要用来产生蛋白质的脱氧核糖核酸序列，即外子。
Given the occurrence of split genes, it might be re-defined as the set of DNA sequences (exons) that are required to produce a single polypeptide.
他们设计将核酸酶导入到控制植物对特定除草剂敏感的烟草基因中。
They designed nucleases to home in on a tobacco gene that controls the plant's susceptibility to certain herbicides.
拉索尔教授运用了一项名为核糖核酸（RNA）干扰的新技术，仅在棉籽中建立了一个阻断棉子酚生长酶的基因序列。
Rathore used a new technique, called RNA interference, to construct a genetic sequence that blocked the gossypol-producing enzyme in the seeds only.
核糖核酸的干扰作用为研究人员搞清生命生长提供了一个新工具——比如说，植物是如何展现其独特外形的，婴儿的小手在母体里是如何形成的，等等。
RNA interference gives researchers a new tool for understanding how living things grow--how a plant assumes a particular shape, for example, or how a baby's hand forms during gestation.
核糖核酸的干扰作用为研究人员搞清生命生长提供了一个新工具——比如说，植物是如何展现其独特外形的，婴儿的小手在母体里是如何形成的，等等。
RNA interference gives researchers a new tool for understanding how living things grow--how a plant assumes a particular shape, for example, or how a baby's hand forms during gestation.
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