Question

George Eberhardt turned 107 last month, and scientists would love to know how he and other older folks like him made it that far. So he's going to hand over some of his DNA.

He's one of 100 centenarians(百歲老人) taking part in a project that examines some of the oldest citizens with one of the newest scientific tools: whole-genome sequencing(全基因組測試), the deciphering of a person's complete collection of DNA.

Scientists think DNA from very old healthy people could offer clues to how they have lived so long. And that could one day lead to medicines to help the rest of us stay disease-free longer.

"It's very hard to get to 105 without some genetic advantages," says Dr. Thomas Perls, a geriatrics(老年醫(yī)學(xué)) expert at Boston University. Dr.Perls is helping find centenarians for the Archon Genomics X Prize competition. The X Prize Foundation, best known for a spaceflight competition, is offering $10 million in prize money to researchers who decipher the complete DNA code from 100 people older than 100. The contest will be judged on accuracy, completeness and the speed and cost of sequencing.

Mr. Eberhardt played and taught tennis until he was 94and says he's participating in the X Prize project because he's interested in science and technology. It's not clear his genes will reveal much. Nobody else in his extended family reached 100, and he thinks only a couple reached 90, he said in a telephone interview.

So why does he think he lived so long? He attributes it to 70 years of marriage to his wife, Marie. She in turn cites his "intense interest in so many things" over a lifetime, from building radios as a child to pursuing a career in electronics research.

But scientists believe there's more to it, and they want to use genome sequencing to investigate. Dr. Richard Cawthon of the University of Utah, who is seeking longevity genes by other means, says it may turn up genetic features that protect against multiple diseases or that slow the process of aging in general.

1.What does the underlined word “deciphering” in the second paragraph probably mean?

A. Separating. B. Interpreting.

C. Gathering. D. Comparing.

2.________ will not be judged by the Archon Genomics X prize competition.

A. How many genes are studied

B. How precise the sequencing is

C. How fast the research is finished

D. The number of researchers

3.The fourth paragraph is mainly about ________.

A.what the Archon Genomics X prize competition is about

B.the significance of studying the genes that lead to longevity

C.how whole-genome sequencing is applied to the study of genes

D.the genetic advantages the centenarians have

4.Which of the following is TRUE about Mr. Eberhardt?

A.He doesn’t have any genetic advantages.

B.Most of his family have been long-lived.

C.His genes don’t reveal much about why he has lived so long.

D.He enjoyed doing electronics research.

5.Which of the following might be the best title for the passage?

A.Comparing One Hundred Centenarians

B.Who Will Win the Archon Genomics X Prize Competition?

C.A New Technology--- Whole –Genome Sequencing

D.Is the Secret to a Long Life in the DNA of Centenarians?

 

Answer 1

1.B

2.D

3.A

4.D

5.D

【解析】

試題分析：為什么有些人會那么長壽，以至于成為百歲老人？近日，科學(xué)家們正準(zhǔn)備對一些百歲高齡的老人們進(jìn)行基因研究，以此希望發(fā)現(xiàn)長壽的秘密并研制出有助延年益壽的藥物。

1.詞意猜測題。前半句說這是全基因組測試，后面用逗號隔開，是前面部分的同位語，因此是對whole-genome sequencing的解釋。Separating分隔；Interpreting解釋；Gathering聚集；Comparing比較。所以選B。

2.

3.

4.

5.

考點(diǎn)：科普類閱讀。