Step by Step 3000 第3册 Unit6:Human genome project(2)
日期:2016-01-20 17:19

(单词翻译:单击)

B. Keywords.

DNA, deciphering, genetic code, a series of letters, human genome, sorted out, function, mapping, cure.
Vocabulary

decipher, lifeblood, embryo, scroll, cystic fibrosis.
Now listen to a second news report about the human genome project, choose the correct answers for the following questions.
Charts of DNA. The genetic blueprint of human beings. Deciphering the genetic code is the lifeblood of top researcher Ira Herskowitz.
To help ordinary folks understand what's going on, Herskowitz turns to music.
Well, it just so happens that inside of everyone, are tiny plans to tell how the job's to be done.
They're worth more to you than the family jewels, they're stored in the form of molecules like everything else, I guess... Only different and kinda special.
He says people should welcome, not fear genetic research.
When they hear about DNA, they might think about some monster movie they saw, but they really ought to understand that knowing about DNA is going to enrich their life and improve their health.
DNA molecules contain about three billion pieces to a puzzle.
Pieced together, they form genes that provide instructions on how to build all the unique cells that make up a human being.
It is a series of letters, the alphabetic is only four letters, a, c, g and t and 3 billion of those in the proper order is what we use, ever since we were a one celled embryo until now to carry out the biological functions that we humans have to do.
Like some four letters coded alien script, newly sequence DNA scrolls over the Internet.
I wouldn't want to write a novel with four letters, so I think I'll write a human being instead...
Thanks mostly to new technology, twenty percent of the three billion letter human genome has already been sorted out.
The National Institutes of Health says 90% will be completed within a year.
And the challenge then will be to understand how the roughly 80,000 genes that reside in that script do what they do and how they are involved in health and disease.
Researchers are finding genes faster than they can figure out how they function, genes for breast cancer, cystic fibrosis, Parkinson's disease are already under intense study.
But just mapping the human genome doesn't end the journey. Figuring out how to use the map to deliver the cure is the next big job.
If you've got any questions about something you missed, please see me, all class dismissed.

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重点单词
  • enrichvt. 使富足,使肥沃,添加元素
  • functionn. 功能,函数,职务,重大聚会 vi. 运行,起作用
  • challengen. 挑战 v. 向 ... 挑战
  • containvt. 包含,容纳,克制,抑制 vi. 自制
  • puzzlen. 谜,难题,迷惑 vt. 使困惑,使为难 vi. 迷
  • scriptn. 手稿,脚本,手迹 vt. 为...准备手稿
  • scrolln. 卷轴,目录 v. 卷动
  • genomen. [生]基因组;[生]染色体组
  • deciphervt. 译解
  • uniqueadj. 独一无二的,独特的,稀罕的