'Cybrids' are produced by
'Cybrids' are produced by
Select an option to attempt
Correct Answer: Option D
Explanation
RNA Polymerase II (Pol II) is responsible for transcribing protein-coding genes (mRNA precursors, pre-mRNA) and several non-coding RNAs. Pol II transcribes: all mRNA (protein-coding); most snRNAs (small nuclear RNAs involved in splicing); miRNAs (microRNAs, most are embedded in Pol II transcripts); snoRNAs in some cases; enhancer RNAs (eRNAs). RNA Polymerase III (Pol III) transcribes: tRNA (all), 5S rRNA, 7SL RNA, U6 snRNA, some miRNAs. RNA Polymerase I (Pol I) transcribes: 28S, 18S, and 5.8S rRNA. Therefore tRNA and 5S rRNA are NOT transcribed by Pol II — they are Pol III products.