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Which of the following prevents the digestion of mRNA by exonucleases?(a) methyl-guanosine cap(b) methylene blue(c) poly(A) tail(d) bromophenol blueI have been asked this question in semester exam.My doubt stems from Gene Expression in portion Gene Expression of Cell Biology |
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Answer» RIGHT CHOICE is (a) methyl-guanosine cap The best explanation: The methylguanosine cap at the 5’ end of the MRNA PREVENTS its digestion by the exonucleases and also plays an important role in the initiation of TRANSLATION. |
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