Regions around a gene encoding a mRNA. Exon I of the mRNA contains the translati
ID: 207221 • Letter: R
Question
Regions around a gene encoding a mRNA. Exon I of the mRNA contains the translation initiation AUG codon. Exon IV contains the UGA termination codon. The letters A through E above the diagram refer to areas of the gene, and its transcript located directly below them.
3 POINTS This diagram represents regions around a gene encoding a mRNA. Exon I of the mRNA contains the nslation initiation AUG codon. Exon IV contains the UGA termination codon. The letters A through E above the gram refer to areas of the gene, and its transcript located directly below them. A BC upstrean exon il exon downstream 75 25AUG UGA a. What region (A-E) of the primary transcript is removed by a spliceosome? b. What region(s) (A-E) of the DNA likely contain the TATA box? c. At which site (A-E) is the poly (A) tail added to the transcript? d. At which site (A-E) is the 5' cap added to the transcript?Explanation / Answer
A) Spiliceosomes remove introns from genes and here only D represents an intron. So, only D will be removed by spliceosomes.
B) TATA box is found upstream of the AUG codon at -25 region. So it will be B region.
C) Poly A tail will be added at E site that is 3'.
D) 5' cap will be added to the C site.