試題詳解

40. About split gene and RNA splicing, which of the following statements is NOT TRUE?
(A) The coding regions are called exons because they are expressed and usually translated into proteins.
(B) The other regions called introns. They are noncoding regions, which contain intervening sequences that are nonfunctional.
(C) RNA splicing removes introns and joins exons, creating an mRNA molecule with a continuous coding sequence.
(D) Alternative RNA splicing is a type of eukaryotic gene regulation in which different RNA molecules are produced from the same primary transcript, depending on which RNA segments are treated as exons and which as introns.
(E) Alternative RNA splicing produces a number of different proteins called isoforms from a single gene, therefore significantly expand the repertoire of an eukaryotic genome.