【英语时差8,16】基因的组织方式

I know that every cell in my body has a copy of my DNA¹ packed into its nucleus². And I also know that if I could somehow unravel³ the DNA from a single cell, it would be about six feet long. So my question is, is DNA jammed into the nucleus in a sort of random⁴ knot? D:Great question! Scientists know that DNA is able to fit into such a small space because it’s wound tightly around proteins. But scientists also thought that DNA was randomly⁵ packed in. Researchers at MIT have figured out that that’s not true.The way that DNA is packed in a cell nucleus is more organized. Y:How so? D:Well, the researches aren’t certain–they’ve only discovered clues. But based on what they’ve found, it seems that parts of DNA that are being transcribed⁶ or copied are located together. Y:Cool.But so what?I don't mean to seem on curious,but what is it matter whether we know how DNA is organized？ D:It matters because the way that DNA is organized affects how it works. In fact, other studies have shown that genes⁷ that are near each other may affect one another. They can even switch each other on and off. Y:I see. Like most physical objects,I guess that what DNA does depends at least a part on how its part fit together. D:Right.And the more scientist know about those parts,the better they understand how thw whole thing actually works.

1 DNA   

(缩)deoxyribonucleic acid 脱氧核糖核酸

参考例句：

• DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
• Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。

2 nucleus   

n.核，核心，原子核

参考例句：

• These young people formed the nucleus of the club.这些年轻人成了俱乐部的核心。
• These councils would form the nucleus of a future regime.这些委员会将成为一个未来政权的核心。

3 unravel   

v.弄清楚（秘密）；拆开，解开，松开

参考例句：

• He was good with his hands and could unravel a knot or untangle yarn that others wouldn't even attempt.他的手很灵巧，其他人甚至都不敢尝试的一些难解的绳结或缠在一起的纱线，他都能解开。
• This is the attitude that led him to unravel a mystery that long puzzled Chinese historians.正是这种态度使他解决了长期以来使中国历史学家们大惑不解的谜。

4 random   

adj.随机的；任意的；n.偶然的(或随便的)行动

参考例句：

• The list is arranged in a random order.名单排列不分先后。
• On random inspection the meat was found to be bad.经抽查，发现肉变质了。

5 randomly   

adv.随便地，未加计划地

参考例句：

• Within the hot gas chamber, molecules are moving randomly in all directions. 在灼热的气体燃烧室内，分子在各个方向上作无规运动。 来自辞典例句
• Transformed cells are loosely attached, rounded and randomly oriented. 转化细胞则不大贴壁、圆缩并呈杂乱分布。 来自辞典例句

6 transcribed   

（用不同的录音手段）转录( transcribe的过去式和过去分词 )； 改编（乐曲）（以适应他种乐器或声部）； 抄写； 用音标标出（声音）

参考例句：

• He transcribed two paragraphs from the book into his notebook. 他把书中的两段抄在笔记本上。
• Every telephone conversation will be recorded and transcribed. 所有电话交谈都将被录音并作全文转写。

7 genes   

n.基因( gene的名词复数 )

参考例句：

• You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因，所以能够活得很长。 来自《简明英汉词典》
• Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪