This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'Normal role of Micro RNA is \nSelect and explain. \nA. Gene Regulation, B. RNA splicing, C. Initiation of translation, D. DNA conformational change', 'role': 'user'}, {'content': 'Answer: A \nExplanation: MicroRNA (abbreted miRNA) is a small non-coding RNA molecule (containing about 22 nucleotides) found in plants, animals, and some viruses, that functions in RNA silencing and post-transcriptional regulation of gene expression.miRNAs (microRNAs) are sho non-coding RNAs that regulate gene expression post-transcriptionally. They generally bind to the 3&;-UTR (untranslated region) of their target mRNAs and repress protein production by destabilizing the mRNA and translational silencing.', 'role': 'assistant'}]