複選題10. Which of the following statements regarding "Transcription of RNA" are CORRECT? (A) RNA polymerase II synthesizes mRNA and several snRNAs involved in RNA splicing in the nucleoplasm. (B) Initiation of transcription requires RNA polymerase loading onto the chromosome at the promoter of a gene or operon. (C) Eukaryotic RNA polymerase I, II and III promoter sequences are all situated upstream of the transcription start site. (D) In addition to RNA polymerases, RNA transcription in eukaryotes also requires multiple initiation factors termed general transcription factors (GTFs). (E)The end of a gene is marked by a terminator sequence that forms a hairpin structure in the RNA.