試題詳解

5. Which of the following statements about small RNA is not correct?
(A) Small RNAs are short, non-coding RNA molecules that can regulate gene expression.
(B) Small RNAs can regulate gene expression in the nucleus via chromatin- dependent gene silencing.
(C) Most small interfering RNAs (siRNAs) are generated through multiple processing steps from longer primary transcripts produced by RNA polymerase II.
(D) Most microRNAs (miRNAs) form imperfectly complementary stem-loop structures, pair imperfectly with sites in the 3' untranslated region of their target mRNAs.
(E) Both miRNAs and siRNAs are produced from longer RNA precursors through the activity of ribonuclease IlI-like nucleases called Dicer in animals and DICER- LIKE (DCL) in plants.