This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Genetics, Subject name: Biochemistry
[{'content': "Poly 'A' tail attached at 31 end of mRNA helps in- \nSelect and explain. \nA. Unwinding of mRNA, B. Stabilization of mRNA, C. Polymerization of mRNA, D. Transcription of mRNA", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Stabilization of mRNA o At the 51-end, mRNA possesses a 7-methylguanosine triphosphate cap which helps in the recognition of mRNA in protein biosynthesis and it helps to stabilize the mRNA by preventing attack of 51'-exonuclease.o At its 31-end. there is a poly-A tail made up of several adenylate residues which stabilize mRNA by preventing attack of 31-exonuclease.", 'role': 'assistant'}]