The molecular approach to detecting peptide hormones using cDNA probes should also be much faster than the immunological method because it can take years of tedious purifications to isolate peptide hormones and then develop antiserums to them. Roberts, expressing the sentiment of many researchers, states: I was trained as an endocrinologist. But it became clear to me that the field of endocrinology needed molecular biology input. The process of grinding out protein purifications is just too slow.

　　If, as the initial tests with cDNA probes suggest, peptide hormones really are made in brain in areas other than the hypothalamus, a theory must be developed that explains their function in the brain. Some have suggested that the hormones are all growth regulators, but Rosens work on rat brains indicates that this cannot be true. A number of other researchers propose that they might be used for intercellular communication in the brain.

　　1. Which of the following titles best summarizes the text?

　　[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?

【2014考研英语阅读经典试题及答案(13)】相关文章：

★ 第1809期阅读理解附答案

★ 2008年12月英语六级阅读备考的技巧及词汇6

★ 英语四级考试阅读习题及答案解析(7)

★ 2013年最新的英语六级阅读练习题及答案3

★ 第1806期阅读理解附答案

★ 2013年最新的英语六级阅读练习题及答案2

★ 2013年大学英语六级考试阅读的训练题9

★ 英语四级考试阅读备考材料(3)

★ 2015年6月英语四级阅读必备词汇：工作类(1)

★ 2010年6月英语六级仔细阅读的答案