The researchers demonstrated how information in pieces of DNA is translated into the thousands of proteins contained in living matter.
VOA: special.2009.12.08
Here the unique thing was that there's a restriction site inside that is present in normal DNA and not present in sickle DNA.
刚才例子中,特性就是在正常的基因中,有酶切位点,而在患者的基因中却没有
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.
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
Scientist Cecil Lewis said the human DNA could have been there because people had had contact with the bone.
VOA: special.2011.03.15
The Hepatitis B vaccine I talked about before produced by recombinant DNA technologies, called Recombivax HB, that's one version of it.
我曾经提到过的通过DNA重组技术,制造的乙型肝炎疫苗,被称作重组乙型肝炎疫苗,那是该疫苗的型号之一
The Royal Swedish Academy says the DNA in cells contains the designs for how people, plants and bacteria look and operate.
VOA: special.2009.12.08
That's one of the properties of mitosis, that the DNA gets completely duplicated during the S phase, during DNA synthesis phase.
有丝分裂的一个特征,就是DNA在S期内完全复制,S期就是DNA合成期
The group said Congress should support large amounts of money for all areas of forensic science, not just DNA.
VOA: special.2009.10.03
If you have DNA fragments, so this is DNA that you've cut up into fragments using restriction enzymes for example.
如果你有DNA片段,例如有一段你用限制酶,切割成片段的DNA
So far,DNA testing has cleared the term is exonerated more than two hundred forty people in the United States.
VOA: special.2009.10.03
We talked about the structure of DNA, how it works in terms of a physical chemical model of the DNA molecules.
上节课我们讲了DNA的结构,从理化模型的角度讲了,DNA分子是如何工作的
Now we know that genetics makes this connection even deeper and we are linked to our ancestors by DNA.
VOA: special.2009.12.01
That's something about the physical chemistry of DNA, what it looks like, and how it behaves in the simple sense.
上面我们直观地讲解了DNA的理化特点,DNA的结构,以及它的功能
The DNA particles were designed so pieces next to each other contained eighty letters that overlapped, with one placed over the other.
VOA: special.2010.07.20
If I wanted to link another nucleotide to this DNA chain what would I attach here on the bottom?
如果想把另一核苷酸连接到这条DNA链,我将会在DNA链末端添加什么
Human DNA carries the information that decides our heredity, the characteristics passed on to us by our ancestors.
VOA: special.2010.03.23
It's called cDNA or complimentary DNA to indicate that it's a copy, a complimentary copy of the messenger RNA.
它叫cDNA或者互补DNA,意味着它是一个拷贝,一个信使RNA反转录得出的DNA拷贝
The study found that sixteen babies born by C-section had higher DNA-methylation rates immediately after they were born than the other babies.
VOA: special.2009.11.24
G2 is a phase that indicates the gap between when DNA synthesis occurs and when the next mitotic event occurs.
2期是在DNA合成期完成后,到分裂期开始前的间期
Or,he said human DNA really was present in the bone, but the bone was too small or low-quality to repeat the first results.
VOA: special.2011.03.15
These molecules of DNA, very long molecules of DNA, are condensed and packaged within the nucleus of every cell in your body.
这些DNA分子是非常长的,它们通过折叠等方式压缩形成染色体后,被装配在你身体内的每一个细胞内
Inside the yeast cell, the yeast machinery recognized that the two DNA pieces had the same order.
VOA: special.2010.07.20
If the DNA is synthesized exactly correctly, so each one gets the right copies of DNA, what other differences could there be?
如果DNA的合成精确无误,每个子细胞都有一套相同的DNA,那会有什么其他的不同点呢
Scientists are testing bone from Nikumaroro to learn if DNA, deoxyribonucleic acid, can be recovered from it.
VOA: special.2011.01.18
Now DNA that's produced this way is not called genomic DNA because this doesn't match the DNA in your genome, on your chromosomes,right?
现在造出来的这个DNA,不叫基因组DNA,因为这跟你基因组里的DNA不一样,跟你染色体上的基因不一样,对吧
The DNA of the flowering azalea plant,for example, contains all the information that makes it an azalea.
VOA: special.2010.03.23
They enter the cell after recognizing, they fall apart inside the cell, they reproduce their DNA, or their genetic material using host mechanisms.
在识别细胞后侵入之,它们在细胞内解体,复制自身的DNA,利用宿主的遗传来机制复制自己的DNA
He had shared a Nobel Prize for his part in the discovery of the structure of DNA.
VOA: special.2010.03.23
The nucleus contains all the DNA, and so the early stages of gene expression, transcription, happened inside the nucleus where all the DNA is.
NA都在细胞核里,所以早期的基因表达,转录,发生在将所有DNA,都包于其中的细胞核中
While there are only four different bases that make up either RNA or DNA, and so the complexity of an RNA polymer is limited.
在RNA或DNA的构成中,只含四种不同的碱基,因此一个RNA分子的复杂程度是有限的
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