試題詳解

38. RNA splicing can be regulated by exonic and intronic splicing enhancers and silencers. Which of the following descriptions about RNA splicing is not correct?
(A) Alternative splicing is often associated with strong splice sites.
(B) Specific exonic and intronic sequences can enhance or suppress splice-site selection.
(C) SR protein binds to exonic splicing enhancers and the heterogencous nuclear ribonucleoproteins hnRNP A and B bind to exonic silencers.
(D) Other RNA-binding proteins can function as splicing regulators by binding to intronic splicing enhancers or silencers.
(E) Binding of both Nova and Fox to intronic sequences upstream of the alternative exon results in the suppression of exon. together.