Youareonlyasoldasyoufeel，itissaid．Butsoonscientistswill...

问题详情：

You are only as old as you feel，it is said．But soon scientists will be able to calculate

your real” physiological（生理的）age”．

    Researchers studying genes believe they can calculate exact physiological age by looking at a number of clues in DNA．They don’t have to ask people how they feel or look at their appearance．

    The breakthrough could solve the mystery of why some 70-year-olds function at the level of those in their 50s，while others become frail（虚弱的）sooner than you would think．

    The researchers made the breakthrough by finding the“biomarkers”of aging in tiny worms（虫子）．

    The worms they studied had all average lifespan（寿命）of three weeks．Humans’ some remain live much longer than other similarly-aged worms，while others show signs of premature aging．

    By genetically profiling（基因识别）104 different worms at various ages，the researchers found a group of genes that are involved in the aging process．

    “This is a first step ;our results were not perfect，but we were able to predict the ages of the animals 70 percent of the time，which is far better than anything that has been done before．”said Sireon Melov the lead researcher at Buck Institute for Age Research in California.

Now they want to extend their studies to mice and eventually humans．

    “I am confident that at some point there will be a non-subjective（主观的）method of determining how old someone is with a high level of confidence，”said Melov．

    The speed at which people age depends on a number of things including genetic inheritance（遗传），lifestyle and mental health．

    Determining chronological（按时间顺序的）age in both worms and humans is easy-count forward from birth．But determing physiological age has remained subjective－based on how someone looks or functions．

    The findings have special meanings for age research in humans．Examining biomarker over time would provide a scientific basis for anti—aging medicines．The technology would also provide a means of determining whether a person is aging faster or slower than people would normally think．

1．The passage mainly talks about           

A．the new finding of gene studying

B．the relationship between genes and the age

C．the breakthrough in mental health

D．biomarkers of aging, in tiny worms

2．The researchers’ next goal is to study        

A．tiny worms              B．biomarkers           C．humans           D．mice

3．Which of the following statements is TRUE?

   A．The researchers have found biomarkers of ageing in humans．

   B．The researchers are able to predict the ages of the humans 70 percent of the time．

   C．People’s aging depends oil genetic inheritance，lifestyle and mental health，etc．

   D．There will be a simple method of determining how old someone is．

4．In the future，scientists will ____          

   A．produce effective anti-ageing medicines

   B．find a group of genes that are involved in the ageing process

   C．determine physiological age subjectively

   D．set up an institute to calculate humans’ real age

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ADCA

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