Question

Use the following model of a eukaryotic transcript to answer the question.

5' UTR E1 I1 E2 I2 E3 I3 E4 UTR 3'

When the spliceosome binds to elements of this structure, where can it attach?
A. to the end of an intron
B. to the 5' UTR
C. to the 3' UTR
D. to the exons
E. to an adjacent intron and exon

Answer 1

The spliceosome binds at the junctions between introns and exons in the eukaryotic transcript for the splicing process.

Step-by-step explanation:

The process of splicing in eukaryotic cells involves the removal of non-coding sequences known as introns from the pre-messenger RNA (pre-mRNA) transcript. The machinery responsible for this is called the spliceosome. When the spliceosome binds to the transcript, it specifically attaches at the junctions between introns and exons, recognizing special sequences at the 5' and 3' ends of the introns. Therefore, the correct answer to the question of where the spliceosome can attach is to an adjacent intron and exon.