RNAs have a broader range of functions, and several classes are found in cells: __________________. A: mRNAs B: RNAs C: tRNAs D: miRNAs

Which are correct about the descriptions of mRNA? A: Among the three RNAs, the metabolic rate is the fastest‍ B: The secondary structure contains local double helix C: It consists of two subunits D: There are m7Gppp cap and polyA tail E: It contains genetic information