The degradation of mRNA begins, when its tail reduces to _________ residues.(a) 2(b) 3(c) 20(d) 30I got this question by my school principal while I was bunking the class.The above asked question is from Gene Expression Control topic in section Control of Gene Expression of Cell Biology

The degradation of mRNA begins, when its tail reduces to _________ res

1.	The degradation of mRNA begins, when its tail reduces to _________ residues.(a) 2(b) 3(c) 20(d) 30I got this question by my school principal while I was bunking the class.The above asked question is from Gene Expression Control topic in section Control of Gene Expression of Cell Biology
Answer» Right answer is (d) 30 Best EXPLANATION: When an mRNA leaves the nucleus, it contains ROUGHLY 200 ADENINE RESIDUES (in the poly-adenine tail), but these are nibbled AWAY by a deadenylase. The degradation of mRNA starts when the residues are reduced to 30.

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