試題詳解

29. Long noncoding RNAs (lncRNAs) are described as long transcripts more than 200 nucleotides, lacking protein-coding potential. LncRNAs participate in regulation of gene expression at multiple levels via interacting with DNA, RNA and proteins.
(A) LncRNAs are transcribed by RNA pol II but no intron, no cap and no poly（Ａ） tail.
(B) LncRNAs have high expression levels.
(C) LncRNAs are more enriched in the cytoplasm.
(D) LncRNAs recruit PRC2 complex and lead to H3K27 methylation for gene inhibition.
(E) All are correct.