Question

What is the function of the process shown which occurs during eukaryotic protein synthesis?

• A. A final protein product is being produced at the end of translation.
• B. Unnecessary segments of the mRNA transcript are being removed prior to the start of translation.
• C. Spliceosomes and snRNPs are excising exons and producing a final mRNA transcript.
• D. A mutation is being repaired by enzymes before translation begins.

Answer 1

The correct option is C Spliceosomes and snRNPs are excising exons and producing a final mRNA transcript.

Eukaryotes genes are split genes i.e., the presence of introns and exons. During the synthesis, the premRNA is synthesised which is converted into mature mRNA. Splicing is the removal of introns from the primary transcript and ligation of exons to form a continuous sequence specifying a functional polypeptide and is mediated by a set of snRNPs together forming spliceosomes. A spliceosome is a large complex molecular machine found within the splicing speckles of the nucleus of eukaryotic cells. Thus, the correct answer is option C.