申論題

II. Essay Type Question (25 points in total)
26. Dr. Marvel discovered a new species of bat at Wohun, and studied a gene encoding an appetite-modulating peptide called Dracula. The gene dracula has a sequence (that of coding strand) as shown below:
5'ACCGCCGCCATGGCGTCGGTGGCCACCATGCTCCTGGCAACGGTCAGACACTTCGGTGCGGCGTAA-3
He discovered that 2 species of mRNA can be formed from this gene. The first one is a polyribonucleotide encoded by the above sequence, and was found in brain. The second polyribonucleotide carries an inosine (I)residue at position 10, and was found in stomach. No mutation was found in the gene.

a. Which process is involved in the formation of the "stomach" form of mRNA? (3 points)