m RNA also known as messenger RNA is a copy of the information which is carried by DNA. The m RNA moves the information from the DNA to the translation machine. The size and sequence of the m RNA is heterogeneous. It a 5 ' cap composed of a 5' to 5' triphosphate linkage. the cap is between two modified nucleotides. Most of the mRNA molecules contain -Adenosine tail at the 3' end. The 5' and the 3' help to stabilize the mRNA in the cell.
mRNA contains introns and exons. Introns are removed by RNA splicing leaving the exons. the Exons contain the information which is to be carried. Both the introns and exons are joined together to form the m RNA. m RNA are never found free, they are bound by cations and proteins like in DNA. The structure of the m RNA is very variable, there is no fixed structure as such.
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