Question

QUESTION 1 A segment of mature edited mRNA that correctly codes for a protein is as follows: 5-ACGUUCGCUUUAGCUAGCCA-3 . Match each of the pre-edited mRNA sequences with the correct editing mechanism. - 5'-ACGCGCAGCAGCCA-3' A. A-G conversion - 5'-AGUUGCUUUAGUAGA-3 B. C-U conversion - 5'-ACGCCCGCCCCAGCCAGCCA-3' C. C-Insertion - 5'-ACAUUCACUUUAGCUAACCA-3' D.U-Insertion QUESTION 2 3 po Match the term with its function. - - - A. Necessary for RNA export from the nucleus small nuclear RNA + protein complexes, involved in * intron removal 5' cap poly-A tail sRNP spliceosome group I intron Guides mRNA to ribosomes and protects it from ** exonuclease activity - - D. self-splicing intron E. Structure in which introns are spliced out of hnRNA

Answer 1

Question 1)
Option 3 should be matched with C to U conversion
Reason: we can see the number of nucleotides has to match and it is the only segment which has 20 nucleotides matching with the edited mRNA and if we make a C to U it absolute matches .

Question 2)

5 cap is necessary for export of RNA from nucleus. So option ( A)

Poly A tail guides the mRNA and avoids ribonuclease digestion so option (C)

Sn RNP removes the introns so option (E)

Splicosome has multiple components to remove Introns so option (B)

Group 1 intern is a self splicing intron so option ((D)