11. Which of the following titles best summarizes the passage?
Is Molecular Biology the Key to Understanding Intercellular Communication in the Brain?
Molecular Biology: Can Researchers Exploit Its Techniques to Synthesize Peptide Hormones?
The Advantages and Disadvantages of the Immunological Approach to Detecting Peptide Hormones
Peptide Hormones: How Scientists Are Attempting to Solve Problems of Their Detection
Peptide Hormones: The Role Played by Messenger RNA s in Their Detection
12. The passage suggests that a substance detected in the brain by use of antiserums to peptide hormones may
have been stored in the brain for a long period of time
play no role in the functioning of the brain
have been produced in some part of the body other than the brain
have escaped detection by molecular methods
play an important role in the functioning of the hypothalamus
13. Which of the following is mentioned in the passage as a drawback of the immunological method of detecting peptide hormones?
It cannot be used to detect the presence of growth regulators in the brain.
It cannot distinguish between the peptide hormones and substances that are very similar to them.
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