In eukaryotes, some DNA sequences act as introns in some cells and as exons in other cells. This is ...

In eukaryotes, some DNA sequences act as introns in some cells and as exons in other cells. This is an
  example of __________.
  a. gene repression
  b. mRNA splicing
  c. gene amplification
  d. differential mRNA processing
  e. gene processing

Question 2

Some eukaryotic DNA sequences act as introns in the cells of some tissues and exons in the cells of
  other tissues. This allows:a.
   prevention of harmful mutation.
  b. regulation of the rate of transcription.
  c. formation of different types of closely related proteins.
  d. regulation of the rate of translation.
  e. repression of DNA replication.