38. A microRNA (miRNA) is a small non-coding RNA, which can down-regulate mRNA expression levels. Please choose the correct statement about animal miRNA.
(A) A miRNA can re ecognize many mRNAs.
(B) It is 10-20 nucleotides in length single-stranded RNA.
(C) It is perfectly complemnentary to its mRNA targets.
(D) It is a ribonuclease.
(E) It most binds to the coding region of mRNA.
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