複選題
7. Which statements is/are CORRECT in regard to the generation of mRNA in eukaryotes?
(A) Eukaryotic mRNAs are transcribed by RNA polymerase I.
(B) Eukaryotic mRNAs are transcribed by RNA polymerase II.
(C) The primary transcript of the gene is a pre-mRNA that requires splicing to generate the mature mRNA.
(D) Splicing removes exons and retains introns.
(E) The length of a gene is often determined by its exons.
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