1. Which of the following titles best summarizes the text?
[A] Is Molecular Biology the Key to Understanding IntercellularCommunication in the Brain?
[B] Molecular Biology: Can Researchers Exploit Its Techniques toSynthesize Peptide Hormones?
[C] The Advantages and Disadvantages of the Immunological Approach toDetecting Peptide Hormones.
[D] Peptide Hormones: How Scientists Are Attempting to Solve Problems ofTheir Detection and to Understand Their Function?
2. The text suggests that a substance detected in the brain by use ofantiserums 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.
3. According to the text, confirmation of the belief that peptidehormones are created in the brain in areas other than the hypothalamus wouldforce scientists to
[A] reject the theory that peptide hormones are made by endocrine glands.
[B] revise their beliefs about the ability of antiserums to detectpeptide hormones.
[C] invent techniques that would allow them to locate accurately braincells that produce peptide hormones.
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