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How many mice were compared in Spindler's experiment in one group？
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更多“How many mice were compared in Spindler's experiment in one group？”相关的问题
第1题
How many mice were compared in Spindler's experiment in one group？
A．3.
B．6.
C．9.
D．12.
第2题
How many mice were compared in Spindler's experiment in one group？
A.3.
B.6.
C.9.
D.12.
第3题
根据短文回答 41～45 题。
Eat More, weigh Less, Live Longer
Clever genetic detective work may have found out the reason why a near-starvation diet prolongs the life of many animals.
"It's very cool work，"says aging researcher Cynthia Kenyon of the University of California，San Francisc0."These mice eat all they want.10se weight and live longer.It's Like heaven."
Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents.Whether this works in humans is still unknown，partly because few people are willing to submit to such a strict diet
But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life.One theory is that eating less reduces the increase of harmful things that can damage cells.But Kahn's team wondered whether the animals simply benefit by becoming thin。
To find out，they used biology tricks to disrupt the insulin(胰岛素)receptor(受体)gene in lab mice—but only in their fat cells."Since insulin is needed to help fat cells store fat，these animals were protected against becoming fat，"explains Kahn.
This slight genetic change in a single tissue had dramatic effects.By three months of age，Kahn's modified mice had up t0 70 per cent less body fat than normal control mice，despite the fact that they ate 55 per cent more food per gram of body weight.
In addition，their lifespan increased.The average control mouse lived 753 days，while the thin rodents averaged a lifespan of 887 days.After three years，all the control mice had died，but one—quarter of the modified rodents were still alive.
"That they get these effects by just manipulating the fat cells is controversial，"says Leonard Guarente of the Massachusetts Institute of Technology, who studies calorie restriction and agin9.
But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorie-restricted anima.1s."It might be the same effect or there might be two routes to long life，"he points out，"and that would be very interesting."
第 41 题 Ronald Kahn and his colleagues can make mice live longer by（）.
A．offering them less food.
B．giving them a balanced diet.
C．disrupting the specific genes in their fat cells.
D．preventing them growing larger.
第4题
Eat More, Weigh Less, Live Longer
Clever genetic detective work may have found out the reason why a near-starvation diet prolongs the life of many animals.
Ronald Kahn at Harvard Medical School in Boston, US, and his colleagues have been able to extend the lifespan （寿命） of mice by 18 per cent by blocking the rodent's （啮齿动物） increase of fat in specific cells. This suggests that thinness--and not necessarily diet--promotes long life in "calorie （热量卡） restricted" animals.
"It's very cool work," says aging researcher Cynthia Kenyon of the University of California, San Francisco. "These mice eat all they want, lose weight and live longer. It's like heaven."
Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents. Whether this works in humans is still unknown, partly because few people are willing to submit to such a strict diet.
But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life. One theory is that eating less reduces the increase of harmful things that can damage cells. But Kahn's team wondered whether the animals simply benefit by becoming thin.
To find out, they used biology tricks to disrupt the insulin （胰岛素） receptor （受体） gene in lab mice--but only in their fat cells. "Since insulin is needed to help fat cells store fat, these animals were protected against becoming fat," explains Kahn.
This slight genetic change in a single tissue had dramatic effects. By three months of age, Kahn's modified mice had up to 70 per cent less body fat than normal control mice, despite the fact that they ate 55 per cent more food per gram of body weight.
In addition, their lifespan increased. The average control mouse lived 753 days, while the thin rodents averaged a lifespan of 887 days. After three years, all the control mice had died, but one-quarter of the modified rodents were still alive.
"That they get these effects by just manipulating the fat cells is controversial," says Leonard Guarente of the Massachusetts Institute of Technology, who studies calorie restriction and aging.
But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorie-restricted animals. "It might be the same effect or there might be two routes to long life," he points out, "and that would be very interesting."
第 41 题 Ronald Kahn and his colleagues can make mice live longer by.
A．offering them less food.
B．giving them a balanced diet.
C．disrupting the specific genes in their fat cells.
D．preventing them growing larger.
第5题
Ronald Kahn at Harvard Medical School in Boston，US，and his colleagues have been able to extend the lifespan(寿命)of mice by 18 per cent by blocking the rodent’s(啮齿动物) increase of fat in specific cells.This suggests that thinness--and hot necessarily diet—-promotes long life in “ calerie (热量卡) restricted” animals.
“It’s very cool work.”says aging researcher Cynthia Kenyon of the University of California，San Francisco.“These mice eat all they want，lose weight and live longer.It’s like heaven.”
Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents.Whether this works in humans is still unknown，partly because few people are willing to submit to such a strict diet.
But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life.One theory is that eating less reduces the increase of harmful things that can damage cells.But Kahn’s team wondered whether the animals simply benefit by becoming thin.
To find out。they used biology tricks to disrupt the insulin(胰岛素)receptor(受体)gene in lab mice—_but only in their fat cells.“Since insulin is needed to help fat cells store fat，these animals were protected against becoming fat，”explains Kahn.
This slight genetic change in a single tissue had dramatic effects.By three months of age，Kahn，s modified mice had up to 70 per cent less body fat than normal control mice，despite the fact that they ate 55per cent more food per gram of body weight.
In addition，their lifespan increased.The average control mouse lived 753 days，while the thin rodents averaged a lifespan of 887 days.After three years，all the control mice had died，but one--quarter of the modified rodents were still alive.
“That they get these effects by just manipulating t11e fat cells is controversial，”says Leonard Guarente of the Massachusetts Institute of Technology, who studies calorie restriction and aging.
But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorie.restricted animals.“It might be the same effect or there might be two routes to long life，”he points out，“and that would be very interesting.”
第11题：Ronald Kahn and his colleagues can make mice live longer by
A．offering them less food．
B．giving them a balanced diet．
C．disrupting the specific genes in their fat cells．
D．preventing them growing larger
第6题
根据下面材料，回答题。
Eat More, Weigh Less, Live Longer
Clever genetic detective work may have found out the reason why a near-starvation diet prolongs the life of many animals.
Ronald Kahn at Harvard Medical School in Boston, U.S., and his colleagues have been able to extend the lifespan (寿命) of mice by 18 per cent by blocking the rodent&39;s (啮齿动物) increase of fat in specific cells. This suggests that thinness--and not necessarily diet--promotes long life in"calorie (热量卡) restricted" animals.
"It&39;s very cool work," says aging researcher Cynthia Kenyon of the University of California,San Francisco. "These mice eat all they want, lose weight and live longer. It&39;s like heaven."
Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodents. Whether this works in humans is still unknown partly because few people are willing to submit to such a strict diet.
But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer life. One theory is that eating less reduces the increase of harmful things that can damage cells. But Kahn&39;s team wondered whether the animals simply benefit by becoming thin.
To find out, they used biology tricks to disrupt the insulin (胰岛素) receptor (受体) gene in lab mice, but only in their fat cells. "Since insulin is needed to help fat cells store fat, these animals were protected against becoming fat," explains Kahn.
This slight genetic change in a single tissue had dramatic effects. By three months of age,Kahn&39;s modified mice had up to 70 per cent less body fat than normal control mice, despite the fact that they ate 55 per cent more food per gram of body weight.
In addition, their lifespan increased. The average control mouse lived 753 days, while the thin rodents averaged a lifespan of 887 days. After three years, all the control mice had died, but one-quarter of the modified rodents were still alive.
"That they get these effects by just manipulating the fat cells is controversial," says Leonard Guarente of the Massachusetts Institute of Technology, who studies calorie restriction and aging.
But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorie-restricted animals. "It might be the same effect or there might be two routes to long life," he points out,."and that would be very interesting."
Ronald Kahn and his colleagues can make mice live longer by__________. 查看材料
A.offering them less food
B.giving them a balanced diet
C.disrupting the specific genes in their fat cells
D.preventing them growing larger
第8题
"Well," the workman answered, "you remember the house we were repairing in Newbridge last week, don't you？ One of the things we had to do there was to put in some new electric wiring. Well, in one place we had to pass some wires through a pipe thirty feet long and about an inch across, which was built into solid stone and has four big bends in it. None of us could think how to do this until I had a good idea. I went to a shop and' bought two white mice, one of them male and the other female. Then I tied a thread to the body of the male mouse and put him into the pipe at one end, while Bill held the female mouse at the other end and pressed her to help her. I suppose he was a gentleman even though he was only a mouse. Anyway, as he ran through the pipe, he pulled the thread behind him. It was then quite easy for us to tie one end of the thread to the electric wires and pull them through the pipe."
The manager paid the bill for the white mice.
The manager wondered why ________.
A．the workman sent a bill to the company
B．the mice bought for the job were a male and a female
C．the workman had paid for the mice
D．mice were needed in repairing a house
第9题
How many umbrellas were there in Jack's home？
A．There were nine.
B．There were eight.
C．There was only one.
第10题
How many people were injured or killed in the blasts？
A．Nobody were killed, four injured.
B．Two were killed, five injured.
C．Two were killed, seven injured.
D．Nobody were killed, seven injured.
