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Which of the box is retained in mature mRNA?(a) TATA box(b) Pribnow box(c) G/U box(d) AU boxI had been asked this question during an internship interview.I need to ask this question from Post-Transcriptional Modification topic in section Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer»

Correct answer is (d) AU box

Explanation: The TATA box and Pribnow box are PART of the promoter so they are not EVEN transcribed into RNA. The GU box on the other hand is cleaved off during polyadenylation while the AU box is retained even after polyadenylation.



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