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单词 A DNA
释义

A DNA

原声例句
福尔摩斯基本演绎法第二季

A DNA test will contradict you, but I don't think that's going to be necessary.

验一下DNA就能戳穿你的谎言但我觉得没有必要。

VOA Standard 2015年8月合集

That's been proven with a DNA test.

DNA检测已对此做出相关证明。

Crash Course 植物学篇

Take mutations, or spontaneous changes to a DNA sequence.

以突变或 DNA 序列的自发变化为例。

英语小霸王

Blood on the gauze is a DNA match for Colin.

确定他当晚就在帕特丽夏的房子里。

VOA Special 2019年1月合集

To do a DNA extraction and then start sequencing in the field.

我们要提取DNA,然后开始在农田里进行测序。”

PBS趣味科普

You just have to provide a DNA sample by spitting in a tube.

你只需要在试管中吐痰来提供 DNA 样本。

读者文摘选编

In December 2017, she sent Mika a DNA test as a Christmas present.

2017年12月,她送了米卡一个DNA测验,作为圣诞礼物。

PBS趣味科普

Humans seem really different, but on a DNA level we're remarkably similar.

人类似乎真的不同,但在 DNA 水平上,我们是非常相似的。

逍遥法外 第三季

We got a DNA match to someone who was associated with Ms. Keating.

上面的DNA和与基廷女士有关联的人相匹配。

摩登家庭第九季_Modern Family-Season09

Okay, in order to get a definitive answer, I had Alex perform a DNA test.

为了得到确切的结果,我请艾丽克斯做了亲子鉴定。

经济学人(汇总)

The map is dominated by a DNA cluster that might reasonably be described as English.

可合理称之为英格兰人的基因群在地图上的分布数量最多。

读者文摘选编

After watching this emotional turmoil, Shelley Loewenstern, Joanne's daughter-in-law, suggested taking a DNA test.

乔安妮的儿媳雪莉·洛文斯顿看到了她的情感困扰,她建议乔安妮去做一个DNA测试。

VOA Special 2017年3月合集

Officials are also waiting for a DNA sample from a family member to identify the body.

官员还希望死者家属提供DNA样本以鉴定死者身份。

生活大爆炸 第4季

Well, no one's going to run a DNA test on it, Leonard. Honestly, you overthink everything.

又没人会去验DNA 莱纳德 说真的 你想得太多了。

逍遥法外 第二季

That we've come to based on a DNA match that was manufactured by the Philadelphia P.D.

而我们是根据费城警局捏造的DNA检测结果才召开的传讯。

VOA常速英语_美洲

And, so, I went ahead and took a DNA test and I explained all that to them.

然后我就会拿出我的DNA检测报告,跟他们一一解释。

CNN 听力 2013年5月合集

Investigators can use something called a DNA fingerprint to profile based on information from 13 DNA regions.

调查人员可以使用来源于13 个DNA区域一种名为DNA指纹档案信息。

绝望的主妇(音频版)第三季

I'm also running a DNA panel, since we won't be able to use her dental records.

我正在进行DNA取样,因为我们无法核对她的牙齿记录。

Osmosis-遗传

Cas9 is a DNA endonuclease, so that means it can cut DNA like a pair of molecular scissors.

Cas9是种DNA内切酶,这意味着它可以像把分子剪刀一样切断DNA。

福尔摩斯基本演绎法第二季

This is a court order to collect a DNA sample to compare to the ears in the box.

法院下令取得你的DNA样本跟盒子里的耳朵进行比对。

中文百科

A-DNA A-DNA

(重定向自A DNA)
ADN-A, ADN-B y ADN-Z.
The A-DNA structure.
Side and top view of A-, B-, and Z-DNA conformations.

A-DNA又称A型DNA,为DNA双股螺旋的一种形式,拥有与较普遍的B-DNA相似的右旋结构,但其螺旋较短较紧密。A-DNA是三种具有生物活性的DNA双螺旋结构,另两种则为B-DNA及Z-DNA。一般只有脱水的DNA样本中才会出现,可用来作晶体学实验。此外当DNA与RNA混合配对时,也可能出现A-DNA形式的螺旋。

英语百科

A-DNA A-DNA

(重定向自A DNA)
The A-DNA structure.
Side and top view of A-, B-, and Z-DNA conformations.
Yellow dots represent the location of the helical axis of A-, B-, and Z-DNA with respect to a Guanine-Cytosine base pair.

A-DNA is one of the possible double helical structures which DNA can adopt. A-DNA is thought to be one of three biologically active double helical structures along with B-DNA and Z-DNA. It is a right-handed double helix fairly similar to the more common B-DNA form, but with a shorter, more compact helical structure whose base pairs are not perpendicular to the helix-axis as in B-DNA. It was discovered by Rosalind Franklin, who also named the A and B forms. She showed that DNA is driven into the A form when under dehydrating conditions. Such conditions are commonly used in to form crystals, and many DNA crystal structures are in the A form. The same helical conformation occurs in double-stranded RNAs, and in DNA-RNA hybrid double helices.

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更新时间:2025/6/19 20:13:40