题目内容

Which of the following statement about microRNA is NOT correct:()

A. Most miRNA will be separately located in the genome, only a few appear in cluster.
B. Each miRNA may target several genes, but the same gene is regulated only by one miRNA.
C. The sequence of miRNA is highly conservative in different species.
D. The regulation of translation process by miRNA relys on RNA-induced silencing complex (RISC).

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In miRNA synthesis,which is the right order of the following molecules to produce or to work:①Dicer protein②RISC complex③primary miRNA④pre-miRNA⑤Drosha protein()

A. ④⑤①③②
B. ③⑤②④①
C. ②①③⑤②
D. ③⑤④①②

when DNA chip is used for analysis of differential gene expression, the purified mRNA can be directly used to hybridize with DNA chip and we just need to prevent RNA sample from degradation of ribonuclease.()

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