Unlocking the Human Genome（基因组) 1 A project to unlock secrets-what scientist could resi

第1题

听力原文：The Human Genome Project, a great $ 3 billion, 15-year task aimed at drawing the

听力原文： The Human Genome Project, a great $ 3 billion, 15-year task aimed at drawing the genetic map of humans, is now more than 90 percent complete. The scientific and medical communities are very excited about the chances genetic research provides for getting rid of diseases and prolonging human life. But those communities and policy makers are also careful about the scientific door they are opening as the project uncovers the mysteries of life.

For the last few years, the genetic advances in the fast developing field of biotechnology have provided materials for all kinds of work, but the developments of modern science in unlocking the secrets of human genetic code have opened a world of possibilities for human health, as well as for the population imagination.

While European and Japanese researchers are making rapid progress in decoding human DNA, the leading organization for genetic research in the Untied States, which began in 1990, is "unlocking the code" of the human body to learn how to defeat fatal diseases. Already, the Human Genome Project has become widely known and praised for finding the genes connected with as yet terrible diseases, and making progress toward separating the genes that show a sign of breast cancer or AIDS.

Once these genes are found and studied, researchers can develop new ways to attack infections, and genetic diseases. Medical companies are very interested in mapping the human genome; as they expect to develop a lot of new drugs for these illnesses.

Why did the scientists work so hard at mapping the human genome？

A．Because the human genome can destroy many illnesses.

B．Because the human genome's completion can help to get rid of many diseases.

C．Because they wanted to be better known than others.

D．Because the Human Genome Project can provide a lot of chances of work.

点击查看答案

第2题

Unlocking the Human Genome（基因组)

1 A project to unlock secrets-what scientist could resist that challenge？ This is what many scientists are doing as they work on the Human Genome Project. The aim of the project is to decode(破译)all of the some 100, 000 genes in the human body. Scientists are using DNA fingerprinting techniques to do the decoding.

2 DNA is the substance found in the chromosomes(染色体)of a cell. A chromosome is a chain of genes. Each gene carries a piece of genetic information. At any one moment in a cell, thousands of genes are turned on and off to produce proteins(蛋白质). The challenge for scientists is to find out what role each gene plays in protein production. At some point this decoding will be complete. Then scientists will have a map of an ideal genome, or a picture of the total genetic nature of a human being. The ideal genome is called a consensus(交感)genome. Everything works well in a consensus genome.

3 But no one in the world has a consensus genome. Everyone's genome is different from the ideal. These differences are referred to as genetic mutations(突变). Genetic mutations in a person's genome mean that the person has a greater than average chance of suffering from health problems. Some problems are not life-threatening. These would include things like colorblindness, or mild headaches. Other problems are serious, such as heart disease, or cancer.

4 It will take years to identify the role of each of the 100, 000 genes, The short-term goal of the project is to find the physical and mental health problems a person is likely to encounter during his or her lifetime. The long-term goal is to have each person live a longer, healthier life.

A. How does DNA work？

B. What is the Human Genome Project about？

C. How are the DNA samples collected？

D. What are the goals of the Human Genome Project？

E. What is the role of each gene？

F. What are the consequences of genetic mutations？

Paragraph 1 ______

点击查看答案

第3题

Hearing someone unlocking the door, the man rushed to the back door, （) the table over and alomost （) all the fine plates.

A.knocking; smashing

B.knocked; smashing

C.knocking; smashed

D.to knock; smashing

点击查看答案

第4题

The ___________ is the key to unlocking the mysteries of Egyptian language.

点击查看答案

第5题

Hearing someone unlocking the door, the man rushed to the back door, （) the table over and almost （) all the fine plates.

A.to knock; smashing

B.knocking; smashed

C.knocked; smashing

D.knocking; smashing

点击查看答案

第6题

在输电线路出现两相或三相故障以及载波通信中断时，保护接口设备在一定时间内，向本地保护装置给出定时的接点闭合信号，这个信号是（）。

A.UNLOCKING

B. UNBLOCKING

C. LOCKING

D. BLOCK

点击查看答案

第7题

The mn dressed _____ jens isn expert _____ unlocking doorsnd he cn open door ______ diffic

uThe mn dressed _____ jens isn expert _____ unlocking doorsnd he cn open door ______ difficulty.in, on, with B．on,t, with C．in, on, without D．in,t, without

A．in, on, with

B．on, at, with

C．in, on, without

D．in, at, without

点击查看答案

第8题

Hearing someone unlocking the door, the man rushed to the back door, （) the table over and alomost （) all the fine plates.

A.to knock; smashing

B.knocking; smashed

C.knocked; smashing

D.knocking; smashing

点击查看答案

第9题

Hearing someone unlocking the door, the man rushed to the back door, （) the table over and alomost （) all the fine plates.

A.to knock; smashing

B.knocking; smashed

C.knocked; smashing

D.knocking; smashing

点击查看答案