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GRE阅读模拟在线练习附答案一百四十八

2018-09-11 14:07:00来源：网络

　　Which of the following titles best summarizes the passage?

　　A.Is Molecular Biology the Key to Understanding Intercellular Communication in the Brain?

　　B.Molecular Biology: Can Researchers Exploit Its Techniques to Synthesize Peptide Hormones?

　　C.The Advantages and Disadvantages of the Immunological Approach to Detecting Peptide Hormones

　　D.Peptide Hormones: How Scientists Are Attempting to Solve Problems of Their Detection and to Understand Their Function

　　E.Peptide Hormones: The Role Played by Messenger RNA's in Their Detection

　　The passage suggests that a substance detected in the brain by use of antiserums to peptide hormones may

　　A.have been stored in the brain for a long period of time

　　B.play no role in the functioning of the brain

　　C.have been produced in some part of the body other than the brain

　　D.have escaped detection by molecular methods

　　E.play an important role in the functioning of the hypothalamus

　　According to the passage, confirmation of the belief that peptide hormones are made in the brain in areas other than the hypothalamus would force scientists to

　　A.reject the theory that peptide hormonesare made by endocrine glands

　　B.revise their beliefs about the ability of antiserums to detect peptide hormones

　　C.invent techniques that would allow them to locate accurately brain cells that produce peptide hormones

　　D.search for techniques that would enable them to distinguish peptide hormones from their close relatives

　　E.develop a theory that explains the role played by peptide hormones in the brain

　　Which of the following is mentioned in the passage as a drawback of the immunological method of detecting peptide hormones?

　　A.It cannot be used to detect the presence of growth regulators in the brain.

　　B.It cannot distinguish between the peptide hormones and substances that are very similar to them.

　　C.It uses antiserums that are unable to cross the blood-brain barrier.

　　D.It involves a purification process that requires extensive training in endocrinology.

　　E.It involves injecting foreign substances directly into the bloodstream.

　　The passage implies that, in doing research on rat brains, Rosen discovered that

　　A.peptide hormones are used for intercellular communication

　　Bcomplementary DNA's do not bind to cells producing peptide hormones

　　C.products closely resembling peptide hormones are not identical to peptide hormones

　　D.some peptide hormones do not function as growth regulators

　　E.antiserums cross-react with substances that are not peptide hormones

　　Which of the following is a way in which the immunological method of detecting peptide hormones differs from the molecular method?

　　A.The immunological method uses substances that react with products of hormone-producing cells, whereas the molecular method uses substances that react with a specific component of the cells themselves.

　　B.The immunological method has produced results consistent with long-held beliefs about peptide hormones, whereas the molecular method has produced results that upset these beliefs.

　　C.The immunological method requires a great deal of expertise, whereas the molecular method has been used successfully by nonspecialists.

　　DThe immunological method can only be used to test for the presence of peptide hormones within the hypothalamus, whereas the molecular method can be used throughout the brain.

　　E.The immunological method uses probes that can only bind with peptide hormones, whereas the molecular method uses probes that bind with peptide hormones and substances similar to them.

　　The idea that the field of endocrinology can gain from developments in molecular biology is regarded by Roberts with

　　A.incredulity

　　B.derision

　　C.indifference

　　D.pride

　　E.enthusiasm

　　正确答案:D C E B D A E

　　以上就是关于“GRE阅读模拟在线练习附答案一百四十八”的内容，更多精彩内容，请关注GRE频道!


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