Chapter 8, Problem 39P

a.	Very few if any eukaryotic genes contain tracts with more than 25 As or Ts in a row, yet almost all eukaryotic mRNAs have a tract with more than 100 As in a row. How is this possible?
b.	Scientists know the nucleotide sequences that direct the termination of bacterial gene transcription, but they generally have little idea about the nature of the nucleotide sequences that direct transcription termination in eukaryotic cells. Explain the basis of this statement.