Interrupted coding sequences include long sequences of bases that do not code for amino acids. These ...

Interrupted coding sequences include long sequences of bases that do not code for amino acids. These
  noncoding sequences, called __________, are found in __________ cells.
  a. exons; only prokaryotic
  b. introns; only prokaryotic
  c. exons; only eukaryotic
  d. introns; only eukaryotic
  e. exons; both prokaryotic and eukaryotic

Question 2

Introns in pre-mRNA are known to:
  a. code for specific protein domains.
  b. undergo excision, whereby they are spliced out of the message.
  c. be able to move within the mRNA, thereby giving rise to new exon combinations.
  d. protect pre mRNA from enzyme degradation.
  e. code for important amino acid sequences.