Biology Forums - Study Force

Your friend has isolated a protein present in the cheek cells of all straight-A seniors at your school.
 
  She says that this protein helps you remember everything you read and therefore will help cut down on the number of hours needed to study for exams. She sequences the protein, which she calls geniuszyme, and designs a probe to isolate the gene that encodes it. She has consulted with a company expert at this process and they have 100 confidence that her probe will work. She also obtains a high-quality liver cDNA library from the company and uses her probe to try to isolate the gene for geniuszyme. Unfortunately, she is unable to isolate any clones.
  A. What is the likely explanation for her failure?
  B. Not to be discouraged, your friend has obtained some genomic DNA isolated from the nuclei of liver cells and has made a genomic library from that DNA. Do you expect she will succeed in isolating the geniuszyme gene from this library? Why or why not?

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