1 Which one of the following statements is generally true about
RNA polymerase II?
1 It is dedicated to transcribing RNA from a single transcription
unit, generally a large transcript which is then processed to yield
three types of ribosomal RNA.
2 It transcribes varieties of small non-coding RNAs which are
expressed in all cell types.
3 It generally synthesises various types of mRNA and small
non-coding RNAs.
4 It is exclusively involved in synthesis of rRNA and tRNA.
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Explanation:
A structural gene is a gene that codes for any RNA or protein product other than a regulatory factor (i.e. regulatory protein). ... Also encoded by structural genes are non-coding RNAs, such as rRNAs and tRNAs (but excluding any regulatory miRNAs and siRNAs)......
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